Research indicates that parental monitoring is especially important during

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In the present study, we used separate measures of parental monitoring and parental knowledge and compared their associations with youths’ antisocial behavior during preadolescence, between the ages of 10 and 12. Parental monitoring and knowledge were reported by mothers, fathers and youths taking part in the Environmental Risk (E-Risk) Longitudinal Twin Study which follows 1,116 families with twins. Information on youths’ antisocial behavior was obtained from mothers, as well as teachers. We report two main findings: First, longitudinal cross-lagged models revealed that greater parental monitoring did not predict less antisocial behavior later, once family characteristics were taken into account. Second, greater youth antisocial behavior predicted less parental knowledge later. This effect of youths’ behavior on parents’ knowledge was consistent across mothers’, fathers’, youths’, and teachers’ reports, and robust to controls for family confounders. The association was partially genetically-mediated according to a Cholesky decomposition twin model; youths’ genetically-influenced antisocial behavior led to a decrease in parents’ knowledge of youths’ activities. These two findings question the assumption that greater parental monitoring can reduce preadolescents’ antisocial behavior. They also indicate that parents’ knowledge of their children’s activities is influenced by youths’ behavior.

Keywords: parental monitoring, parental knowledge, antisocial behavior, bidirectional

Theories and clinical interventions emphasize the role of inadequate parenting in the development of behavioral problems during late childhood and adolescence (Jessor, 1987; Gottfredson & Hirschi, 1990; Patterson & Yoerger, 1997). The assumption that a lack of parental monitoring contributes to the development of behavior problems is based on reports that youth who behave antisocially often have parents who are not assiduous about tracking how they spend their time (Glueck & Glueck, 1950; Patterson & Stouthamer-Loeber, 1985). One suggested strategy to reduce and prevent antisocial behavior during this time is encouraging parents to monitor their children’s whereabouts and activities (Dishion & McMahon, 1998; Pettit, Bates, Dodge, & Meece, 1999; Steinberg, Fletcher, & Darling, 1994). Monitoring is thought to minimize antisocial behavior by limiting youths’ opportunities to engage in activities that promote delinquency, such as spending time with deviant peers (Fletcher, Darling & Steinberg, 1995). However, there is controversy surrounding the measurement of parental monitoring and whether and how it influences youths’ antisocial behavior. As a consequence, the interpretation of monitoring-behavior correlations has been called into question (Kerr, Stattin, & Burk, 2010; Stattin & Kerr, 2000). The aim of the present study was to examine the association between parental monitoring and youths’ antisocial behavior across preadolescence.

Parental monitoring comprises parents’ efforts at tracking their children’s activities and whereabouts, including setting rules about where children go, and with whom (Dishion & McMahon, 1998). However, instead of assessing deliberate efforts by parents to find out and control how children spend their time, several studies have collected information on parent’s awareness of their children’s activities, i.e. parental knowledge (Crouter & Head, 2002; Stattin & Kerr, 2000). The approach of operationally defining parental monitoring as parental knowledge has been criticized on the grounds that parents’ monitoring of their children and the knowledge they have about their children’s lives represent two different constructs that may be differentially associated with antisocial behavior (Stattin & Kerr, 2000). Parents might know about their child’s social life but not do anything about it, or parents might think they monitor their child’s social life, but not really know much about it. As a result of sparse data for these two constructs, the independent contributions of parental monitoring and knowledge to antisocial behavior are seldom studied. In the present study, we used separate measures of parental monitoring and parental knowledge and, in a first step, compared their cross-sectional associations with antisocial behavior during preadolescence. We predicted that both monitoring and knowledge would be associated with antisocial behavior, i.e. that youth who display more antisocial behavior have parents who make fewer attempts to monitor them and who know less about their activities and whereabouts.

There are two reasons why youths’ antisocial behavior may be associated with their parents’ monitoring and knowledge. First, it is possible that parents’ lack of monitoring and knowledge increases antisocial behavior in their offspring. This explanation is in line with theories and studies of child socialization that assumed the association between parenting and children’s behavior was mostly unidirectional, with parents’ influencing their children (Baumrind, 1991; Darling & Steinberg, 1993; Dishion & McMahon, 1998; Weintraub & Gold, 1991). Consistent with this notion, longitudinal research has reported a reducing effect of earlier parental monitoring and knowledge on youths’ later antisocial behavior (Abar et al., 2014; Lahey et al., 2008; Willoughby & Hamza, 2011). However, it is now also accepted that children are not passive recipients of parenting, but actively shape their environment, including their parents’ parenting (Bell, 1968; Gault-Sherman, 2012; Pardini, 2008; Sameroff, 2010). A second explanation is therefore that youth who engage in antisocial behavior behave towards their parents in a way that leads parents to reduce their monitoring efforts and to become less knowledgeable. Indeed, it has been demonstrated that the knowledge parents have is mostly a function of youths’ willingness to share information about their lives with their parents, rather than the result of parent-initiated efforts to obtain knowledge, such as asking or tracking activities (Kerr & Stattin, 2010; Stattin & Kerr, 2000). The association between parental knowledge and children’s antisocial behavior may thus not involve deliberate actions from parents, but instead reflect the fact that youth who engage in antisocial behavior tend to withhold information about themselves and their activities from their parents (Keijsers, Branje, Van der Valk, & Meeus, 2010). In the present study, we considered potential reciprocal influences between youths’ and their parents’ behavior. Testing reciprocal parent-child effects is not new, but this study took the novel approach of doing so while testing different predictions about parental monitoring and knowledge. We expected that higher levels of monitoring would predict lower levels of antisocial behavior (more so than the other way around). In contrast, we hypothesized that low parental knowledge would mostly be a consequence of youths’ antisocial behavior, rather than a risk for it.

Furthermore, we tested the influence of youths’ behavior on their parents’ monitoring and knowledge using genetically-sensitive twin methods. Twin designs can further our understanding of the associations between parenting and children’s behavior by providing information about the nature of the relationship between children and their environment (Knafo & Jaffee, 2013; Moffitt, 2005). They stringently test child effects by directly indexing the extent to which children’s genetically-influenced characteristics affect parental behaviors, while holding environmental family-wide or child-specific factors constant. There is evidence that children’s characteristics explain variability in numerous measures relating to parenting behavior, such as parent’s warmth, protectiveness and affect (Kendler & Baker, 2007). These findings lend further support to a bidirectional framework of child-parent interactions, where youths’ inherited characteristics influence their parents’ behavior. In the present study, we examined whether youths’ genetically-influenced behavior affected their parents’ monitoring and knowledge. We expected to find strong genetic influences on parental knowledge, more so than on monitoring, consistent with the reinterpretation of knowledge as an indicator of youth characteristics instead of parent efforts (Stattin & Kerr, 2000). We also expected the genetic influences on knowledge to be due specifically to youth antisocial behavior.

The reinterpretation of parental knowledge as an indicator of youth characteristics, instead of parent efforts, is mostly based on studies of adolescents (Stattin & Kerr, 2000). There is less research that examined how parents’ and children’s characteristics and behavior in early childhood shape parents’ knowledge at the beginning of preadolescence. We therefore extended our analysis to test whether young children’s antisocial behavior influenced parental knowledge at the beginning of preadolescence, over and above maternal warmth. We chose to compare the effects of early antisocial behavior to maternal warmth because it is an important factor for building and maintaining supportive parent-child relationships, which may in return enable parents to gain more knowledge about their children’s activities (Racz & McMahon, 2011). We hypothesized that parental knowledge in preadolescence is already influenced by children’s antisocial behavior early in life.

Parents tend to overestimate the extent of their monitoring and knowledge in comparison to youths’ own perceptions, as indicated by mean differences between parents’ and youths’ reports (Stattin & Kerr, 2000). In addition, parents’ and children’s views of parenting correlate only moderately (De Los Reyes, Goodman, Kliewer, & Reid-Quiñones, 2010; De Los Reyes, 2011). Low agreement between parents’ and youths’ reports of parenting are mostly due to informant-specific perceptions, rather than measurement error (Feinberg, Neiderhiser, Howe, & Hetherington, 2001). This underlines the importance of collecting information from parents and youth, to not only assess the extent to which parents think they monitor and know their children, but also consider youths’ own perspectives. In addition to considering mothers’ and youths’ views, we sought a better understanding of the role of fathers’ monitoring and knowledge. The majority of research on the effects of the family context on children’s antisocial behavior focuses on mothers, either by assessing behaviors in mothers, such as parenting or psychopathology, or by collecting their reports of other family members’ behaviors. The emphasis on mothers may not capture the full picture of parenting because it neglects the involvement of fathers. This is despite research demonstrating the impact of fathers on children’s long-term social, emotional, behavioral and educational development (Lamb, 2010; Sarkadi, Kristiansson, Oberklaid, & Bremberg, 2008), including children’s antisocial behavior (Harold, Elam, Lewis, Rice, & Thapar, 2012; Jaffee, Moffitt, Caspi, & Taylor, 2003; Ramchandani et al., 2013). In the present study, we included reports from mothers, fathers and youths to examine whether our findings varied across different family members. We predicted similar findings when using reports of each of these informants.

Parents monitor girls more than boys and they have more knowledge about their daughters’ whereabouts, compared to their sons’ (Li, Feigelman, & Stanton, 2000; Kerr & Stattin, 2000). There is some evidence to suggest that parental monitoring is more strongly associated with low levels of antisocial behavior in girls compared to boys (Pettit et al., 2001; Racz & McMahon, 2011). We have previously shown that etiological influences on preadolescents’ antisocial behavior differ by sex (Wertz et al., in press), and here we hypothesized that parental monitoring is one such influence that may be more relevant for girls’ antisocial behavior compared to boys’. In this study, we tested this hypothesis by examining sex differences in the longitudinal reciprocal associations between parental monitoring, knowledge and youth antisocial behavior.

The aim of this study was to examine the association between parental monitoring, parental knowledge and youths’ antisocial behaviors between ages 10 and 12, in a prospective cohort of families and their twin children. Previous research has shown that parental monitoring and parental knowledge are two different constructs; we therefore used separate measures for them. We first compared their cross-sectional associations with antisocial behavior during preadolescence, predicting that both monitoring and knowledge would be associated with antisocial behavior. We next examined the longitudinal reciprocal associations between monitoring, knowledge and antisocial behavior. Theoretical formulations highlight monitoring as a parental strategy that reduces antisocial behavior; we tested this hypothesis by examining whether higher levels of monitoring predicted lower levels of antisocial behavior. In contrast, it has been suggested that parental knowledge is mostly a function of youth characteristics and behavior. We therefore expected that higher levels of antisocial behavior would predict lower levels of parental knowledge later on. We then tested further the hypothesis of a child effect on parental knowledge; first, by analysing the genetic and environmental influences on parental monitoring and knowledge, expecting that variability in parents’ knowledge would be mostly accounted for by children’s genetic influences; and second, by comparing the influences of earlier parental warmth and child antisocial behavior on later knowledge, hypothesizing that children’s behavior in early life would already be influential for parental knowledge later on. We included information on family’s socioeconomic status and parents’ mental health in our analyses because parental monitoring, knowledge and youths’ antisocial behavior not only influence each other but may also be affected by other family characteristics that could explain the associations. We also considered different sources of information, including mothers, youths themselves, fathers and teachers, to test whether results were similar across informants. Finally, we tested for the presence of sex differences in the levels of parental knowledge and monitoring and in their longitudinal associations with antisocial behavior.

Participants were members of the Environmental Risk (E-Risk) Longitudinal Twin Study, which tracks the development of a birth cohort of 2,232 British children. The sample was drawn from a larger birth register of twins born in England and Wales in 1994–95 (Trouton, Spinath, & Plomin, 2002). Full details about the sample are reported elsewhere (Moffitt & E-Risk Study Team, 2002). Briefly, the E-Risk sample was constructed in 1999–2000, when 1116 families (93% of those eligible) with same-sex 5-year-old twins participated in home-visit assessments. The sample comprised 55% monozygotic (MZ) and 45% dizygotic (DZ) twin pairs; sex was evenly distributed within zygosity (49% male). Families were recruited to represent the UK population of families with newborns in the 1990s, on the basis of residential location throughout England and Wales and mother’s age. Teenaged mothers with twins were over-selected to replace high-risk families who were selectively lost to the register through non-response. Older mothers having twins via assisted reproduction were under-selected to avoid an excess of well-educated older mothers. The average age of mothers at first birth was M=23 (SD=5.89). When children were age 5, 77% of mothers lived with the twin’s biological father. 90% of E-Risk children are white British.

Follow-up home visits were conducted when the children were aged 7 (98% participation), 10 (96% participation) and 12 (96% participation). Home visits at ages 5, 7, 10, and 12 years included assessments with participants as well as their mother. Each twin participant was assessed by a different interviewer. Parents gave informed consent and children gave assent between 5–12 years. With parent’s permission, questionnaires were posted to the children’s teachers, who completed and returned questionnaires. The Joint South London and Maudsley and the Institute of Psychiatry Research Ethics Committee approved each phase of the study.

At follow up, the study sample represented the full range of socioeconomic conditions in the UK, as reflected in the families’ distribution on a neighborhood-level socioeconomic index (ACORN [A Classification of Residential Neighbourhoods], developed by CACI Inc. for commercial use in Great Britain) (Odgers, Caspi, Russell, et al., 2012). ACORN uses census and other survey-based geodemographic discriminators to classify enumeration districts (~150 households) into socioeconomic groups ranging from “wealthy achievers” (Category 1) with high incomes, large single-family houses, and access to many amenities, to “hard pressed” neighborhoods (Category 5) dominated by government-subsidized housing estates, low incomes, high unemployment, and single parents. ACORN classifications were geocoded to match the location of each E-Risk study family’s home (Odgers, Caspi, Bates, Sampson, & Moffitt, 2012). E-Risk families’ ACORN distribution closely matches that of households nation-wide: 25.6% of E-Risk families live in “wealthy achiever” neighborhoods compared to 25.3% nation-wide; 5.3% vs. 11.6% live in “urban prosperity” neighborhoods; 29.6% vs. 26.9% live in “comfortably off” neighborhoods; 13.4% vs. 13.9% live in “moderate means” neighborhoods; and 26.1% vs. 20.7% live in “hard-pressed” neighborhoods. E-Risk underrepresents “urban prosperity” neighborhoods because such households are likely to be childless.

Mothers’ reports on the monitoring and knowledge of their children’s activities and whereabouts were collected at ages 10 and 12 using ten items from the Monitoring and Supervision Questionnaire (Stattin & Kerr, 2000). Mothers were asked about their monitoring and knowledge during the last 6 months. The items capture, for each twin separately, whether the child needed permission to leave home or before deciding what to do on the weekend, and whether they had to report on where and who they go out with. Mothers also reported on whether they knew the friends their child hangs out with, where they go in their spare time, how they spend their money, what type of homework or tests and projects they have, and how their child performs in different subjects. Answers were recorded as “no, never” (0), “sometimes” (1) and “yes, always” (2). Data were available for 96% of the sample, both at age 10 (N=2,136) and at age 12 (N=2,141).

To determine the presence of two factors of parental monitoring and knowledge in the scale, we conducted an exploratory factor analysis of maternal ratings at age 10, using geomin rotation and the WLSMV estimator for categorical items (Muthen & Muthen, 2010). We retained a 2-factor solution, based on the eigenvalue-greater-than-one-rule (Kaiser, 1960) and structural parsimony. As anticipated, the two factors represented monitoring and knowledge. The first factor contained 6 items and the highest loading items on this factor assessed knowledge about children’s homework and tests or projects at school and about children’s leisure time activities. We named this factor “parental knowledge”. The second factor contained 4 items and the highest loading items on this factor assessed whether children required permission to leave the home, or before deciding what to do on the weekend. We named this factor “parental monitoring”. The monitoring and the knowledge factors correlated (r=.41, p < .001). The internal consistency reliabilities were α=.63 for parental monitoring and α=.75 for parental knowledge. We tested the 2-factor solution that we retained at age 10 for its suitability to describe maternal ratings of monitoring and knowledge at age 12, using a confirmatory factor analysis. The model provided a satisfactory fit to the data: χ2(34)= 249.38, p < .001; CFI=.91; RMSEA=.05 (.048–.061). At age 12, the monitoring and knowledge factors correlated r=.45 (p < .001). Internal consistency reliabilities at age 12 were α=.53 for parental monitoring and α=.68 for parental knowledge. Age-10 parental monitoring did not predict age-12 knowledge, over and above prior levels of knowledge that parents had about their ten-year-old. Similarly, parents’ knowledge at age 10 did not influence their subsequent efforts of monitoring their 12-year-old.

Youths’ reports of their parents’ monitoring and knowledge were collected when they were 12 years, using the same items used with mothers but worded slightly differently (e.g. “Do your parents know.”). Data was available for 95% of twins (N=2,120). Internal consistency reliabilities were α=.65 for parental monitoring and α=.58 for parental knowledge.

Fathers’ reports of monitoring and knowledge were available for a subset of youths at age 12; 30% (N=671) of twins had a father who participated. Information on monitoring and knowledge was collected using the same items as for mothers. The internal consistency reliabilities were α=.70 for paternal monitoring and α=.75 for paternal knowledge. The families of fathers who provided information were socioeconomically more privileged: 25% of the responders were from low SES, whereas of the non-responders, 37% were from low SES backgrounds (p < .01). The mean of fathers’ antisocial behavior (as reported by mothers when twins were age 5) was 13.49 (SD=15.94) for responders and 19.07 (SD=18.59) for non-responders. The mean for youths’ antisocial behavior was 14.30 (SD=14.41) for offspring of responders and 16.31 (SD=14.44) for offspring of non-responders.

The agreement in reports of parental monitoring and knowledge across informants was moderate. The correlation between mothers’ and fathers’ reports was .24 for monitoring and .33 for knowledge. Mothers’ and youths’ reports were correlated .21 for monitoring and .28 for knowledge. Fathers’ and youths’ reports correlated .15 for monitoring and .20 for knowledge. All of these correlations were statistically significant (p < .01).

We assessed antisocial behavior when the twins were aged 5, 10 and 12 using the Child Behavior Checklist for mothers (Achenbach, 1991a) and the Teacher’s Report Form (Achenbach, 1991b). Mothers were given the instrument as a face-to-face interview and teachers responded by mail. Both informants rated each item as being “not true” (0), “somewhat or sometimes true” (1), or “very true or often true” (2) in the 6 months before the interview. The antisocial behavior scale is the sum of the Delinquency and Aggression subscales, including items such as “gets in many fights,” “lying or cheating,” and “screams a lot.” The internal consistencies of mothers’ and teachers’ reports were .89 and .94 at age 5, .93 and .96 at age 10; and 0.92 and 0.96 at age 12. We combined mothers’ and teachers’ reports to obtain a reliable and comprehensive measure of antisocial behavior across settings (Achenbach, Krukowski, Dumenci, & Ivanova, 2005). The correlation between mothers’ and teachers’ report of children’s antisocial behavior was .30 at age 5, .41 at age 10 and .40 at age 12 (all p < .01). Data were available for 96% of the sample at age 10 (N=2,138) and age 12 (N=2,142). We also used teacher reports of antisocial behavior alone, to rule out potential artifact from shared bias in mothers’ reports of knowledge, monitoring, and child behavior.

Maternal warmth was assessed when children were aged 5 using procedures adapted from the Five Minute Speech Sample method (Magana, Goldstein, Karno, Miklowitz, & Falloon, 1986; Caspi et al., 2004). Mothers were asked to speak for 5 minutes about each of their children. Warmth is a global measure of the whole speech sample and was assessed by the tone of voice, spontaneity, sympathy, and/or empathy towards the child. Warmth was coded on a 6-point scale. Inter-rater reliability was established by having the raters individually code audio-tapes describing 40 children. The inter-rater agreement was r = .90. Raters were blind to all other E-Risk Study data. The mean score of age-5 maternal warmth was M=3.27 (SD=1.00; observed range 0–5).

Family socioeconomic status (SES) was defined at age 5 using a standardized composite of parents’ income, education and social class, which loaded significantly onto one latent factor (Trzesniewski, Moffitt, Caspi, Taylor, & Maughan, 2006). The latent factor was divided into tertiles. Thus, 33% of families were characterized as living in a low SES situation during childhood.

Mothers’ major depressive disorder was assessed when the children were 5 years old, using the Diagnostic Interview Schedule (DIS; Robins, Cottler, Bucholz, & Compton, 1995) according to Diagnostic and Statistical Manual-IV criteria (DSM-IV; American Psychiatric Association, 1994). Mothers were asked about the timing of their depression episodes using a life-history calendar; from the twins’ birth to age 5, 29% of mothers experienced at least one episode of depression.

Fathers’ and mothers’ history of antisocial behavior was reported by mothers when the children were 5 years, using the Young Adult Behavior Checklist (Achenbach, 1997), modified to obtain lifetime data and supplemented with questions from the DIS (Robins et al., 1995) that assessed the (lifetime) presence of DSM-IV symptoms of Antisocial Personality Disorder (e.g., deceitfulness, aggressiveness) (APA, 1994). Mothers have been shown to be reliable informants about their partner’s antisocial behavior (Caspi et al., 2001). A symptom of antisocial personality disorder was considered to be present if the mother endorsed the symptom as being “very true or often true”. The mean score for mothers’ antisocial behavior was M=12.72 (SD=10.58, observed range 0–60); the mean score for fathers’ antisocial score was M=17.39 (SD=17.99, observed range 0–88). We combined reports of mothers’ and fathers’ antisocial behavior to obtain a summary measure of parental antisocial behavior. The correlation between reports of antisocial behavior in mothers and fathers was .53 (p<.01).

To examine the bivariate associations between parental monitoring, knowledge and antisocial behavior, we used correlations.

To test whether parental monitoring reduced later antisocial behavior and whether antisocial behavior influenced parental knowledge two years later, we used separate cross-lagged, autoregressive models for monitoring and knowledge between ages 10 and 12. These models account for the cross-sectional overlap and stability of variables. The models included maternal ratings of monitoring and knowledge at ages 10 and 12 because mothers’ reports were available at both time points. We tested the robustness of our findings in three different ways: First, we repeated the analyses using twins’ and fathers’ reports in the cross-lagged models. Twins’ and fathers’ reports were collected at age 12 so we tested whether antisocial behavior at age 10 predicted monitoring or knowledge at age 12. To control for age-10 levels of monitoring and knowledge in the twins’ and fathers’ models, we used maternal reports from age 10. Second, we added covariates to the cross-lagged models, including socioeconomic status, parents’ antisocial behavior and maternal depression. Third, we examined teacher reports of antisocial behavior at ages 10 and 12, instead of a combination of mother and teacher reports. In all models, we accounted for non-independence of twin observations and non-normality of the data by using robust standard errors (Muthen & Muthen, 2010). We tested sex differences in the cross-lagged paths by equating these across sex and examining whether this worsened model fit.

We examined the influences of youths’ antisocial behavior on mothers’ reports of parental knowledge and monitoring using twin methodology (Rijsdijk & Sham, 2002). MZ twins are genetically identical whereas DZ twins share, on average, 50% of their genes. Comparing the correlation of a phenotype within pairs of MZ and DZ twins allows to estimate the relative influence of additive genetic (A), shared environmental (C), and non-shared environmental (E) factors on measures. C represents environmental factors that make members of a family similar, whilst E represents factors that make members of a family different and includes error of measurement. Phenotypes are behaviors or traits that can be measured separately for each twin. Phenotypes include variables of the child’s environment that may be influenced by children’s behavior, such as parental monitoring and knowledge.

We evaluated the influences of youth antisocial behavior on mothers’ reports of parental knowledge and monitoring in two ways. First, we analyzed genetic influences on parental knowledge and monitoring. Aspects of children’s rearing environments such as parental monitoring and knowledge may show genetic influence because children can shape their parents’ behaviors through evocative processes or child effects, some of which have child genetic origins. A finding that parental monitoring or knowledge are under genetic influence would suggest that children’s heritable characteristics account for some of the variance in these variables. An influence of mothers’ own heritable characteristics on their rating of monitoring or knowledge would be reflected in a finding of shared environmental, rather than genetic influences. This is because maternal characteristics (including maternal genetic make-up) affect mothers’ behavior towards their MZ twins as much as towards her DZ twins, thereby minimizing difference between MZ and DZ twins in their phenotypic similarity. If MZ twins are as similar to each other as DZ twins, this increases estimates of shared environment. Finally, a finding of non-shared environment would indicate that even genetically identical twins differ in the level of their parents’ monitoring and knowledge of their whereabouts.

Second, we tested more specifically whether children’s heritable antisocial behavior could account for the hypothesized genetic influences on parental knowledge, using a bivariate Cholesky decomposition (Loehlin, 1996). This model estimates how much of the genetic and environmental influences on one variable explain variance in the other. An example is provided in Figure 1. Paths a11, c11 and e11 indicate the genetic and environmental influences on antisocial behavior at age 10. Paths a21, c21 and e21 reveal whether influences on antisocial behavior at age 10 also explain variance in parental knowledge at age 12. Finally, paths a22, c22 and e22 indicate genetic and environmental influences on knowledge at age 12, that remain after accounting for all influences shared with antisocial behavior at age 10. Thus, if children’s heritable antisocial behavior accounted for genetic influences on parental knowledge, path a21 would be significant. We used bootstrapped standard errors (with 1000 samples) in the behavior genetic analyses.

Bivariate Cholesky decomposition

Note: A = genetic influence, C = shared-environmental influence, E = non-shared environmental influence. Paths a11, c11 and e11 indicate the genetic and environmental influences on antisocial behavior at age 10. Paths a21, c21 and e21 show whether influences on antisocial behavior at age 10 also explain variance in maternal knowledge at age 12. Finally, paths a22, c22 and e22 indicate genetic and environmental influences on maternal knowledge at age 12, that remain after accounting for all influences shared with antisocial behavior at age 10.

To examine whether children’s antisocial behavior influenced parental knowledge at the beginning of preadolescence, over and above mothers’ characteristics, we used a multiple regression analysis, where children’s age-5 antisocial behavior and age-5 maternal warmth predicted age-10 maternal knowledge. All analyses were conducted using Mplus (Muthen & Muthen, 2010).

The mean level of parental monitoring and knowledge was relatively high, indicating that on average, parents and particularly mothers, perceived themselves as highly monitoring and knowledgeable of their youths’ activities and whereabouts (Table 1). As in prior research mean levels of youth-reported parental monitoring and knowledge were lower. There were significant differences between boys and girls for all variables, indicating that girls displayed fewer antisocial behavior problems, and that their parents perceived themselves to be more monitoring and knowledgeable of their whereabouts, compared to boys (Table 1).

Means, SD, N and observed range for parental knowledge, parental monitoring and youths’ antisocial behavior at ages 10 and 12.

TotalBoysGirlsMean (SD)NRangeMean (SD)NRangeMean (SD)NRange
Parental Knowledge
AgeInformant
 10Mothers11.28 (1.42)21380–1211.15 (1.46)10360–1211.41 (1.38)11020–12
 12Mothers10.99 (1.52)21412–1210.81 (1.68)10443–1211.15 (1.33)10972–12
 12Youth9.93 (1.90)21200–129.63 (2.05)10281–1210.21 (1.70)10920–12
 12Fathers10.23 (1.91)6710–1210.19 (2.02)3222–1210.27 (1.81)3490–12
Parental Monitoring
AgeInformant
 10Mothers7.49 (1.07)21340–87.42 (1.13)10340–87.56 (1.00)11000–8
 12Mothers7.20 (1.19)21400–87.09 (1.26)10442–87.30 (1.11)10960–8
 12Youth5.67 (1.74)21140–85.34 (1.87)10240–85.97 (1.54)10901–8
 12Fathers7.11 (1.19)6710–87.08 (1.22)3221–87.13 (1.17)3490–8
Antisocial behavior
AgeInformant
 10Teachers & Mothers15.69 (14.45)21380–11719.34 (15.82)10360–9512.25 (12.07)11020–117
 12Teachers & Mothers15.65 (14.52)21420–10819.17 (16.35)10440–10812.31 (11.60)10980–89

As expected, monitoring and knowledge reported by mothers were both correlated with children’s antisocial behavior, cross-sectionally and longitudinally at ages 10 and 12 (Table 2). The correlations were all negative, indicating that youth who displayed higher levels of antisocial behavior had mothers who monitored and knew less. The magnitude of associations with youths’ antisocial behavior differed between monitoring and knowledge; correlations were smaller for monitoring than for knowledge (Table 2).

Correlations between parental knowledge, monitoring and youth’s antisocial behavior at ages 10 and 12.

Youths’ antisocial behaviorAge 10Age 12r (95% CI)r (95% CI)
Parental monitoring
 Age 10−.15 (−.21, −.09)−.15 (−.20, −.08)
 Age 12−.12 (−.17, −.06)−.13 (−19, −.08)
Parental knowledge
 Age 10−.25 (−.32, −.19)−.20 (−.26, −.14)
 Age 12−.32 (−.37, −.26)−.36 (−.42, −.31)

We first examined the results for monitoring, hypothesizing that higher levels of monitoring would predict lower levels of youths’ antisocial behavior, more so than the other way around. Results were consistent with our prediction, indicating that the more mothers monitored their youths at age 10, the less antisocial behavior youths displayed at age 12 (Figure 2, panel a). We also found that higher levels of antisocial behavior at age 10 were associated with reduced monitoring efforts by mothers two years later.

Longitudinal associations between parental monitoring and youths’ antisocial behavior using mothers’ reports of monitoring at ages 10 and 12 (panel a) and youth and fathers’ reports of monitoring at age 12 (panels b and c)

Note: All associations are expressed as standardized path coefficients. 95% confidence intervals are reported in brackets. Sex differences were non-significant for longitudinal path estimates.

We extended our investigation to test the robustness of our findings. First, we examined whether the results remained similar when replacing mothers’ reports of parental monitoring at age 12 with youths’ and fathers’ reports. Unexpectedly, we found that the results varied across informants (Figure 2, panels b and c): youths’ antisocial behavior predicted youth-reported parental monitoring more strongly that it predicted mother-reported monitoring, although youths’ antisocial behavior did not predict father-reported monitoring significantly. Second, we took into account the potential influence of family SES, parents’ antisocial behavior and mothers’ depression on youths’ antisocial behavior and parents’ monitoring to test whether these variables accounted for the associations we found. When including these family characteristics in the analyses, greater monitoring reported by mothers no longer predicted less antisocial behavior, and youths’ behavior no longer reduced monitoring efforts by mothers two years later (Table 3). Taken together, these results indicate that the reciprocal associations between monitoring and preadolescent antisocial behavior are not robust in this cohort; they were small, inconsistent across informants, and were better accounted for by family background and parents’ characteristics.

Associations between parental monitoring, knowledge and youths’ antisocial behavior adjusting for family and parent characteristics.

EffectParental MonitoringParental Knowledge
Age-10 parental monitoringAge-10 antisocial behaviourAge-10 antisocial behaviour
➞Age-12 antisocial behavior➞Age-12 parental monitoring➞Age-12 parental knowledge
Standardized path estimate (95% CI)Standardized path estimate (95% CI)Standardized path estimate (95% CI)
None−.05 (−.08, −.01)−.07 (−.12, −.02)−.24 (−.30, −.19)
Family SES−.03 (−.07, .01)−.05 (−.10, .01)−.23 (−.28, −.17)
Parent’s antisocial personality−.04 (−.08, .00)−.06 (−.12, −.01)−.22 (−.28, −.16)
Maternal depression−.04 (−.08, −.01)−.07 (−.13, −.02)−.24 (−.30, −.19)
All−.03 (−.07, .01)−.05 (−.11, .00)−.21 (−.27, −.15)

We next examined the results for parental knowledge, expecting that higher levels of youth’s antisocial behavior would predict lower parental knowledge, but that greater knowledge would have little effect on later antisocial behavior. We found that the more antisocial behavior youths displayed at age 10, the less knowledge their mothers had at age 12 (Figure 3, panel a). Knowledge reported by mothers at age 10 did not statistically reduce youths’ antisocial behavior two years later.

Longitudinal associations between parental knowledge and youth’s antisocial behavior using maternal reports of knowledge between ages 10 and 12 (panel a) and youth and fathers’ reports of knowledge at age 12 (panel b and c)

Note: Associations are expressed as standardized path coefficients. 95% confidence intervals are reported in brackets. Sex differences were non-significant for longitudinal path estimates.

We tested the robustness of these results as previously. First, the results remained similar across different informants of parental knowledge, with higher levels of youths’ antisocial behavior at age 10 predicting less parental knowledge as reported by both youth and fathers at age 12 (Figure 3, panels b and c). Second, taking family characteristics into account did not change the pattern of results (Table 3). In addition, we tested whether the results remained when an informant outside the family reported on youths’ antisocial behavior. When using only teachers’ reports of youths’ behavior, the results did not change (Figure 4). Taken together, our findings show that youths’ antisocial behavior predicted lower levels of parents’ knowledge. This effect was consistent across different informants of parental knowledge and youths’ antisocial behavior, and also when someone other than mothers reported on youths’ antisocial behavior, and was robust when family background and parents’ characteristics were taken into consideration.

Longitudinal associations between parental knowledge and youth’s antisocial behavior using teacher reports of antisocial behavior at ages 10 and 12

Note: Associations are expressed as standardized path coefficients. 95% confidence intervals are reported in brackets. Sex differences were non-significant for longitudinal path estimates.

We expected genetic influences on knowledge, more so than on monitoring. For monitoring, genetic influences were small and non-significant (Table 4), indicating that genetically-influenced child characteristics accounted for less variability in monitoring relative to environmental factors. Our results also revealed substantial heritability when examining knowledge: 68% of variance was accounted for by genetic influences, indicating that mothers’ knowledge about their children’s lives was mostly explained by youths’ genetically-influenced behavior.

Genetic and environmental influences on antisocial behavior at age 10 and parental knowledge and monitoring at age 12.

Genetic and environmental influencesA (95% CI)C (95% CI)E (95% CI)
Age-12 parental knowledge.68 (.44, .85).15 (.00, .36).18 (.14, .23)
Age-12 parental monitoring.09 (.00, .21).79 (.68, .87).13(.09, .16)

We hypothesized that genetic influences on knowledge would reflect youths’ antisocial behavior. Our findings provide some confirmation of this prediction. Our results indicated that genetic influences on antisocial behavior at age 10 also accounted for some of the heritability of knowledge at age 12 (Figure 5). More specifically, knowledge showed genetic influence partly because it was influenced by youths’ heritable antisocial behavior. The proportion of variance in knowledge that was explained by genetic and environmental influences on antisocial behavior at age 10 is denoted by the diagonal path estimates in Figure 5, indicating that of the total genetic influences on age-12 knowledge, 6% were genetic influences that also explained variance in children’s antisocial behavior at age 10.

Results of a bivariate Cholesky decomposition of youths’ antisocial behavior at age 10 and parental knowledge at age 12

Note: A = genetic influence, C = shared-environmental influence, E = non-shared environmental influence. 95% Confidence intervals are provided in brackets. The diagonal paths reveal whether genetic and environmental influences on antisocial behavior at age 10 also explain variance in parental knowledge at age 12. All estimates are squared standardized parameter estimates. To obtain the total A, C and E for parental knowledge at age 12, add age 12 paths to diagonal paths (e.g. for genetic influence: .62+.06 = .68, interpretable as 68% of total variance in age-12 parental knowledge accounted for by genetic influence.

We extended our analysis further by examining whether children’s antisocial behavior already early in life influenced later parental knowledge. Consistent with our hypothesis, children’s antisocial behavior at age 5 predicted lower levels of knowledge reported by mothers at age 10 (Figure 6). This effect was comparable to the influence of early maternal warmth on later knowledge. This finding indicates that parental knowledge at the beginning of adolescence is not only influenced by children’s behavior early in life, but also by the warmth that mothers display. We did not conduct this test for parental monitoring, given that we did not hypothesize or find a child effect for monitoring once family background variables were taken into account.

We used data from a prospective cohort of families and their twin children to examine the associations between parental monitoring and knowledge with youths’ antisocial behaviors in preadolescence. There were two main findings. First, young people who displayed antisocial behavior had parents who, two years later, lacked knowledge about their activities at school and in their leisure time. This child effect was solid: it was consistent whether reports came from mothers, fathers, children, or teachers, was robust despite controls for family characteristic and parents’ psychopathology, and it was partially genetically mediated by youths’ earlier antisocial behavior. Second, parental monitoring did not predict lower levels of youth antisocial behavior in this cohort of preadolescents.

Although it is intuitive to assume that parents’ monitoring of their youths’ activities and whereabouts minimizes problem behavior, our findings suggest that on its own, this parenting strategy is not a deterrent of antisocial behavior during preadolescence. We found that whether parents did monitor their youths’ whereabouts more or less during preadolescence did not affect youths’ levels of antisocial behavior later once we accounted for the influence of family and parents’ characteristics. This finding suggests that the reason why youth who behave antisocially are more likely to have parents who monitor little is because a family’s social situation influences both parents’ monitoring and the level of antisocial behavior youths display. Other studies that examined the influence of parental monitoring on later antisocial behavior have obtained inconsistent findings, with some of them reporting an influence of monitoring (Willoughby & Hamza, 2011; Gault-Sherman, 2012; Kiesner et al., 2009). There are several possible explanations for these inconsistencies. Some of the studies that found an association assessed antisocial behavior using items that reflect risk behaviors more broadly, including sexual risk-taking and substance abuse (Fletcher et al., 2004; Willoughby and Hamza, 2011). We did not include such behaviors in our study because they are relatively rare in preadolescence. In addition, it is possible that some of the effects of monitoring on antisocial behavior are moderated by the context in which they occur. For example, monitoring of children’s whereabouts may be particularly meaningful and consequential in samples drawn from deprived neighborhoods where there is more exposure to violence, substance use and deviant peers (Lahey et al., 2008; Pettit, Bates, Dodge, & Meece, 1999).

Our findings indicate that parent’s knowledge about their preadolescents’ activities, friends and whereabouts decreases in response to youths’ antisocial behavior, regardless of who reports their perception of parental knowledge. These results are consistent with findings in older adolescent samples (Kerr et al., 2012; Laird, Pettit, Bates, & Dodge, 2003) but extend previous research by demonstrating that an effect of youths’ behavior on parental knowledge is already present in preadolescence.

One pathway through which youths’ antisocial behavior may reduce parents’ knowledge is through youth disclosure, one of its primary sources (Stattin & Kerr, 2000). Youth are skilled information managers, who consider carefully and strategically which information they disclose to their parents (Marshall, Tilton-Weaver, & Bosdet, 2005; Smetana, 2008). Youth who engage in antisocial, risky behaviors and suspicious leisure activities have got more to hide and may therefore be particularly prone to lying or concealing and more hesitant to disclose information resulting in less parental knowledge (Darling, Cumsille, Caldwell, & Dowdy, 2006; Keijsers & Laird, 2010; Marshall et al., 2005). Second, some knowledge may be gained by parents spending time with their children (Laird, Pettit, Dodge, & Bates, 2003; Willoughby & Hamza, 2011). Antisocial youth tend to have more conflictual relationships with their caregivers (Burt, McGue, Krueger, & Iacono, 2005) and they may be less willing to spend time with them. Likewise, parents may minimize their involvement when confronted with challenging behavior because they grow frustrated and tired of interacting with difficult children (Dishion, Nelson, Bullock, 2004). This absence of positive parent-child involvement would in turn prevent adults from gaining knowledge about their offspring’s activities and whereabouts.

The influence of children’s antisocial behavior on parental knowledge was not unique to preadolescence, but was already present when we extended our analysis to early childhood. Maternal warmth was also important, so that mothers who expressed more warmth had more knowledge about their children’s activities and whereabouts later on. Maternal warmth may help to establish more trusting parent-child relationships in which children feel more comfortable to disclose information about their lives, leading to higher levels of parental knowledge (Blodgett Salafia, Gondoly, & Grundy, 2009). However, even at this early age, children’s antisocial behavior was already as important as maternal warmth in predicting later parental knowledge, indicating that to understand the origins of parental knowledge at the beginning of preadolescence, we need to take into account children’s as much as parents’ behavior during early childhood.

Contrary to common perceptions, we found that the association between parents’ knowledge and youths’ antisocial behavior was due to youths’ behavior reducing knowledge over time, rather than the other way around. This finding is consistent with the notion that the association between antisocial behavior and knowledge is driven by youths’ characteristics, for example antisocial behavior (Stattin & Kerr, 2000, Keijsers et al., 2010; Kerr et al., 2010). There are some studies that report a significant, but small link between parents’ knowledge and later antisocial behavior, even when accounting for youths’ initial behavior problems (Abar et al., 2014; Graber, Nichols, Lynne, Brooks-Gunn, & Botvin, 2006; Marceau et al., 2015). It is notable that studies reporting such an effect were often conducted at a later age, whereas our study period was during preadolescence. Any positive effects of knowledge may be confined to later adolescence. In addition, there are differences across our and previous studies in the questions used to assess parental knowledge, with specific questions about parents’ ongoing knowledge about health habits, sexual behaviors and use of drugs (Marceau et al., 2015). It is possible that knowledge about these health risk-taking behaviors is more strongly related to future antisocial behavior.

There is little research on the genetic and environmental influences on parental knowledge. Our findings showed that youths’ genetically-influenced characteristics were important in explaining why some mothers knew more about their children than others. This underlines that parental knowledge is largely a function of youths’ behavior, as opposed to parents’ actions (Stattin & Kerr, 2000). In contrast, individual differences in mothers’ reports of parental monitoring were not explained by genetic influences, suggesting that monitoring is mostly a function of mothers’ own behavior, such as her warmth or her mental health, and family characteristics, such as socioeconomic status. Different etiological influences on monitoring and knowledge lend further support to the idea that these are different constructs, and that their associations with problem behaviors need to be examined separately.

The child effect on parental knowledge that we found in the cross-lagged models was largely genetically mediated, via youths’ antisocial behavior. This is further evidence for the importance of youths’ antisocial behavior in influencing their parents’ knowledge (Stattin & Kerr, 2000). Interestingly, although genetic influences largely explained the association between youths’ antisocial behavior and parents’ knowledge, they accounted for only a small proportion of the observed total genetic influence. This indicates that, in addition to antisocial behavior, parental knowledge is also influenced by other youths’ behaviors, possibly the tendency to be secretive, withdrawn or shy (Keijsers & Laird, 2010).

There have been reports of environmentally-mediated effects of parental monitoring and knowledge on youths’ problem behavior (Marceau et al., 2015; Neiderhiser, Marceau, & Reiss, 2013). These studies differ from our research in some important ways. First, the outcome we examined in this study was antisocial behavior, as opposed to substance use (Neiderhiser et al., 2013). Interestingly, in studies where assessments of youths’ problem behavior contain measures of substance use, effects of monitoring appear to be stronger than when problem behavior is measured as antisocial, disruptive behavior only (Fletcher et al., 2004; Willoughby & Hamza, 2011). Thus, it is possible that parental monitoring is an effective and environmentally-mediated deterrent of substance use, more so than of other forms of antisocial behavior. A second difference lies in the type of knowledge that this study assessed. We collected information on parents’ knowledge of youths’ spare time and school activities, whereas some previous studies also assessed what parents knew about youths’ health habits, sexual behaviors and use of drugs (Marceau et al., 2015). These behaviors and parents’ knowledge about them may be more predictive of youths’ future antisocial behaviors. This interpretation raises the possibility that it is not the extent of parental knowledge, but also the type of knowledge that parents possess, that is important for preventing youths’ future antisocial behaviors.

Consistent with previous studies (Li, Feigelman, & Stanton, 2000; Kerr & Stattin, 2000), we found that girls were monitored more closely by their parents, and that parents reported they knew more about their daughters’ whereabouts compared to their sons’. Differences in monitoring could be due to parents’ greater safety concerns for their daughters (Vieno et al., 2010) or more acceptance of boys’ autonomy. Differences in parents’ knowledge may also be due to girls’ disclosing more information about their lives to their parents, particularly to their mothers (Kerr & Stattin, 2000; Smetana, Metzger, Gettman, & Campione-Barr, 2006). Contrary to our hypothesis, we did not find sex differences in the longitudinal, reciprocal associations between parental monitoring, knowledge and youth antisocial behavior. These findings indicate that parents’ monitoring does not predict lower antisocial behavior in girls compared to boys, and even though boys show higher levels of antisocial behavior, girls’ problem behavior decreases subsequent parental knowledge as much as boys’ behavior.

Our findings must be interpreted in light of some limitations. First, there were a few statistical issues that may have attenuated the effect of earlier parental knowledge and monitoring on later levels of youth antisocial behavior. Maternal ratings of parental monitoring and knowledge at age 10 were skewed and showed little variance, with the majority of mothers reporting they monitored and knew well their children’s activities and whereabouts. With a small number of mothers who monitored or knew only little about their child, it was difficult to statistically detect whether less monitoring and knowledge predicted more antisocial behavior. However, our conclusions are supported by previous research that did not have this problem (Keijsers et al., 2010; Kerr et al., 2010). In addition, our scales of monitoring and knowledge showed relatively low internal-consistency reliability. In future studies, it might be worthwhile using a more extensive assessment of these two constructs. Also, antisocial behavior was more stable over time compared to parental monitoring and knowledge, which means that there was less variability in antisocial behavior at age 12 to be predicted by monitoring and knowledge. As shown in our results, we obtained very similar findings when using teachers’ reports of antisocial behavior across time, which exhibited a degree of stability that was more comparable to parental knowledge. However, we are unable to completely exclude the possibility that differential stabilities may have contributed to the pattern of results. Second, we examined the associations between monitoring, knowledge, and antisocial behavior at a relatively early age. Preadolescence is a time when there is a sharp decrease in the amount of time children spend with their families and an increase in their unstructured and unsupervised leisure time (Larson & Richards, 1991), which may provide opportunities to engage in antisocial behaviors. The prevalence of antisocial behavior rises between childhood and adolescence as well (Bendixen & Olweus, 1999). Examining the effects of parental knowledge and monitoring during this time is therefore both developmentally and clinically relevant. Third, our sample comprised twins and we cannot be certain that our results generalize to singletons. However, twins and singletons do not differ in their prevalence of antisocial behaviors or antisocial personality traits (Johnson, Krueger, Bouchard, & McGue, 2002; Moilanen et al., 1999) and effect sizes for associations between risk factors and psychopathology outcomes have generally been found to be similar across behavioral genetic and non-genetic studies (Moffitt & E-Risk Study Team, 2002). Fourth, our analyses of the effects of monitoring and knowledge on antisocial behavior could not be entirely repeated with data from fathers or youth. Reassuringly, other studies indicate that youths’ own ratings of parental monitoring or knowledge are no more predictive of antisocial behavior than mothers’ (Kerr & Stattin, 2003). Fifth, our sample of fathers was not representative of the population with regards to socio-economic status and parents’ antisocial behavior. Our findings using fathers’ information should be interpreted with caution but they were consistent with the results obtained for youths’ and mothers’ reports.

Our study has implications for future research. First, examining the association between children’s antisocial behavior and parental knowledge in the context of families’ day-to-day functioning may contribute to a better understanding of this effect of youths’ behavior on parents’ knowledge. For example, assessing interactions between parents and children using experience sampling or diary data (Smetana, Villalobos, Rogge, & Tasopoulos-Chan, 2010) may reveal the day-to-day processes underlying bidirectional influences between children and their parents. Second, our findings show disagreement between parents’ and youths’ perceptions of parenting. It is worth studying the origins of these different perceptions in more detail, particularly as parent-child disagreement has been associated with negative future outcomes in previous studies (De Los Reyes, 2011; Ringoot et al., 2015). Third, the relevance of monitoring and knowledge for parenting’s effects on antisocial behavior may lie in other more meaningful measures. For example, parental knowledge whether gained through youth disclosure or other means may only become meaningful for youths’ antisocial (or other) behavior when it is translated into parental actions such as disciplining or communicating disapproval (Mounts, 2001; Tilton-Weaver & Galambos, 2003). Likewise, parents’ attempts at monitoring their children may be futile if attempts are executed ineffectually or if children are defiant. Incorporating measures of these processes will advance our understanding of the role of monitoring and knowledge for antisocial behavior.

Our study also has implications for clinical practice. First, our findings emphasize the impact that youths’ behavior, including antisocial behavior, can have on their parents’ behavior. Our results should not be interpreted as minimizing the importance of parenting, but of demonstrating that youths’ behavior is also relevant. Clinicians should be aware that youth influence their families. Likewise, prevention and intervention programs that exclusively focus on parents’ behavior may omit meaningful aspects of the parent-child relationship. Our finding of a genetically-mediated child effect on parenting does not preclude changeability of youths’ or parents’ behavior because genetic influences on children’s antisocial behavior may themselves be moderated by environmental circumstances (Hicks et al., 2009). Second, our findings underline the importance of taking both youths’ and parents’ perceptions of family dynamics into account in clinical practice, as these perceptions may differ and show different associations with problem behaviors. Parents may perceive themselves as diligently monitoring their children’s behavior and activities, whereas youth may not recognize their parents’ monitoring attempts. Third, until it is clearer whether and under what conditions monitoring reduces antisocial behavior, it will be more promising to direct resources towards comprehensive interventions that aim to modify a variety of risk factors for youths’ antisocial behavior (Scott, Spender, Doolan, Jacobs, & Aspland, 2001; Webster-Stratton & Taylor, 2001). Improving these may also create a climate in which youth disclose more to their parents, parents have more knowledge about their children, and parents are able to use monitoring strategies in a way that has an influence on youths’ behavior.

The E-Risk Study is funded by the Medical Research Council (UK MRC grants G9806489 and G1002190). Additional support was provided by ESRC grant RES-177-25-0013, NICHD grant HD061298, and by the Jacobs Foundation. Jasmin Wertz and Carmine M. Pariante are supported by the National Institute for Health Research (NIHR) Mental Health Biomedical Research Centre at South London and Maudsley NHS Foundation Trust and King’s College London. We are grateful to the Study families and teachers for their participation. Our thanks to Avshalom Caspi, Michael Rutter and Robert Plomin, to Thomas Achenbach for his kind permission to adapt the Child Behavior Checklist, to CACI, Inc., and to the members of the E-Risk Study team for their dedication, hard work and insights.

Jasmin Wertz, King’s College London, UK.

Kate Nottingham, King’s College London, UK.

Jessica Agnew-Blais, King’s College London, UK.

Timothy Matthews, King’s College London, UK.

Carmine M. Pariante, King’s College London, UK.

Terrie E. Moffitt, King’s College London, UK. Duke University, USA.

Louise Arseneault, King’s College London, UK.

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