Genetic and environmental contributions to stability and change in levels of self-control

Purpose

There has been an emerging body of research estimating the stability in levels of self-control across different sections of the life course. At the same time, some of this research has attempted to examine the factors that account for both stability and change in levels of self-control. Missing from much of this research is a concerted focus on the genetic and environmental architecture of stability and change in self-control.

Methods

The current study was designed to address this issue by analyzing a sample of kinship pairs drawn from the Child and Young Adult Supplement of the National Longitudinal Survey of Youth 1979 (CNLSY).

Results

Analyses of these data revealed that genetic factors accounted for between 74 and 92 percent of the stability in self-control and between 78 and 89 percent of the change in self-control. Shared and nonshared environmental factors explained the rest of the stability and change in levels of self-control.

Conclusions

A combination of genetic and environmental influences is responsible for the stability and change in levels of self-control over time.     

Genetic and environmental influences underlying the relationship between low self-control and substance use

Purpose

The current study seeks to examine the relationship between low self-control and cigarette smoking, alcohol use, and marijuana use in adolescence and adulthood using behavioral genetic methodology.

Methods

Using a subsample of twin pairs from the National Longitudinal Study of Adolescent Health (Add Health), the current study estimates the genetic and environmental overlap between low self-control and substance use (or problems associated with substance use) across four waves of data collection.

Results

The overall pattern of results suggests that genetic factors explain a moderate proportion of the variance in low self-control and substance use in both adolescence and adulthood. Furthermore, bivariate genetic analyses reveal that the correlation between low self-control and substance use is due, for the most part, to common genetic and nonshared environmental factors.

Conclusions

The current study adds to a growing body of biosocial research on self-control and its relationship to criminal and analogous behaviors. The implications of our findings for the general theory of crime are discussed.     

Genetic and environmental influences on the co-occurrence of early academic achievement and externalizing behavior

Purpose

Several studies have observed a relationship between academic achievement and externalizing behaviors, both of which are predictors of delinquency and criminal behavior in adulthood. There is, however, no consensus on an explanation for their co-occurrence. One perspective is that both emerge as a result of a common underlying factor. This study investigates the degree to which the same genetic and environmental factors account for the co-occurrence of these two outcomes.

Methods

The sample consists of twins (N = 360) from the Early Childhood Longitudinal Survey-Kindergarten Class of 1998-1999. Bivariate genetic analyses were conducted to assess the genetic and environmental influence on the relationship between academic achievement and externalizing behaviors during kindergarten.

Results

The covariation was due primarily to common shared environmental factors (55-87%), followed by common genetic (8-44%) and nonshared environmental factors (1-13%).

Conclusions

Both early academic achievement and externalizing behaviors are partially influenced by the same genetic and environmental factors. The large proportion of covariance attributed to shared environmental influences suggests that identifying and targeting shared environmental factors in prevention and intervention strategies may improve both behavior and academic achievement.     

The Relationship between Self-Control in Adolescence and Social Consequences in Adulthood: Assessing the Influence of Genetic Confounds

Purpose

Assess the relationship between levels of self-control in adolescence and a variety of later-life outcomes and evaluate the confounding effects of genetic factors.

Methods

The current study employed data from the National Longitudinal Study of Adolescent Health (Add Health) and examined whether levels of self-control in adolescence are related to economic, educational, employment, health, relationship and family, and behavioral outcomes in adulthood using DeFries-Fulker regression-based analyses.

Results

Analyses employing non-genetically sensitive methods indicated robust associations between self-control and various social consequences. After estimating genetically-sensitive analyses, however, many associations were no longer significant. Those associations which remained significant were in the reversed direction relative to the non-genetically sensitive models. Additionally, further analyses indicated that some of the remaining significant associations were influenced by nonshared genetic effects.

Conclusions

The findings indicate that even after controlling for the effect of genetic factors, levels of self-control are associated with differences in a variety of social outcomes. However, given the reduction in the number of significant associations and reversal of associations in the genetically sensitive models, analyses of the social consequences of low self-control which do not account for the effect of genetic factors are likely misspecified.     

Aggression and rule-breaking: Heritability and stability of antisocial behavior problems in childhood and adolescence

Purpose

This twin study examined the structure of genetic and environmental influences on aggression and rule-breaking in order to examine change and stability across the span of childhood to mid-adolescence.

Methods

Behavioral assessments were conducted at two time points: age 9–10 years and 14–15 years. Using behavioral genetics biometric modeling, the longitudinal structure of influences was investigated.

Results

Aggression and rule-breaking were found to be influenced by a latent common factor of antisocial behavior (ASB) within each wave of data collection. The variance in the childhood-age common factor of ASB was influenced by 41% genetics, 40% shared environment and 19% nonshared environment. In adolescence, 41% of variance in the common factor were novel and entirely genetic, while the remainder of variance was stable across time. Additionally, both aggression and rule-breaking within each wave were found to have unique influences not common across subscales or across waves, highlighting specificity of genetic and environmental effects on different problem behaviors at both ages.

Conclusions

This research sheds light on the commonality of influences on different forms of antisocial behavior. Future research into interventions for antisocial behavior problems in youth could focus on adolescence-specific environmental influences.     

The influence of neuropsychological deficits in early childhood on low self-control and misconduct through early adolescence

Purpose

Gottfredson and Hirschi (1990) contend that low self-control is the result of parental management techniques. However, an emerging line of research has revealed that neuropsychological deficits influence the development of low self-control ( and ). Nevertheless, these studies have largely tested the effects of neuropsychological deficits on low self-control cross-sectionally or in the short term. This study addresses an important void in the literature by examining the influence of neuropsychological deficits in early childhood on levels of self-control and misconduct through early adolescence.

Methods

Data come from the Early Childhood Longitudinal Survey, Kindergarten (ECLS-K), the largest nationally representative sample of U.S. children.

Results

We found that deficits in neuropsychological functioning during kindergarten were consistently predictive of lower levels of self-control during the third, fifth, and eighth grade as well as higher levels of conduct problems during the eighth grade. These effects remained significant after accounting for demographic variables, features of the neighborhood, and a number of parenting variables.

Conclusions

Neuropsychological deficits during early childhood play an important role in the development of low self-control through early adolescence and misconduct during early adolescence.     

Evidence for a heritable brain basis to deviance-promoting deficits in self-control

Purpose

Classic criminological theories emphasize the role of impaired self-control in behavioral deviancy. Reduced amplitude of the P300 brain response is reliably observed in individuals with antisocial and substance-related problems, suggesting it may serve as a neurophysiological indicator of deficiencies in self-control that confer liability to deviancy.

Methods

The current study evaluated the role of self-control capacity—operationalized by scores on a scale measure of trait disinhibition—in mediating the relationship between P300 brain response and behavioral deviancy in a sample of adult twins (N = 419) assessed for symptoms of antisocial/addictive disorders and P300 brain response.

Results

As predicted, greater disorder symptoms and higher trait disinhibition scores each predicted smaller P300 amplitude, and trait disinhibition mediated observed relations between antisocial/addictive disorders and P300 response. Further, twin modeling analyses revealed that trait disinhibition scores and disorder symptoms reflected a common genetic liability, and this genetic liability largely accounted for the observed phenotypic relationship between antisocial-addictive problems and P300 brain response.

Conclusions

These results provide further evidence that heritable weaknesses in self-control capacity confer liability to antisocial/addictive outcomes and that P300 brain response indexes this dispositional liability.     

A meta-analysis update on the effectiveness of early self-control improvement programs to improve self-control and reduce delinquency

Objective

To update Piquero et al.’s (Justice Quarterly 27:803–834, 2010) meta-analysis on early self-control improvement programs.

Methods

Screening of eligible studies was carried out for the period between January 2010 and September 2015. An additional seven studies were identified, which were added to the original database of 34 studies, totaling an overall sample of 41 eligible studies. A random effects model was used to obtain an overall mean effect size estimate. Additional analyses were performed to assess publication bias and moderation.

Results

Overall average, positive, and significant effect sizes were observed for improving self-control (0.32) and reducing delinquency (0.27). There was evidence of publication bias for the self-control improvement outcomes, as well as some evidence of moderation for both self-control improvement and delinquency outcomes.

Conclusions

Early self-control improvement programs are an effective evidence-based strategy for improving self-control and reducing delinquency.

     

Similarities and differences between perceptions of peer delinquency,peer self-reported delinquency,and respondent delinquency: An analysis of friendship dyads

Purpose

Despite the peer delinquency measurement debate having profound implications for research, looming questions remain about the validity of various forms of peer delinquency operationalizations. This study examines whether perceptions of peer delinquency form identical latent constructs to both respondent and peer self-reported delinquency.

Methods

Using a dyadic dataset of friendship pairs, confirmatory factor analysis and model comparison tests are used to determine the degree of similarity between perceptions of peer delinquency, respondent self-reported delinquency, and peer self-reported delinquency.

Results

Peer self-reports and respondent perceptions of peer delinquency load on unique constructs across a number of different behaviors. For most behaviors, respondent perceptions of peer delinquency and respondent self-reports load on separate constructs. Results further indicate that respondent and peer self-reported delinquency are separate latent constructs. Finally, the strength of the association between respondent and peer delinquency is substantively smaller in magnitude, by as much as a factor of three in some instances, when peer delinquency is measured via peer self-reports in place of respondent perceptions.

Conclusions

Reports of peer delinquency provided directly from peers demonstrate strong discriminant validity in relation to self-reported delinquency, while perceptions of peer delinquency demonstrate poorer discriminant validity, particularly for theft and violence constructs.     

Do peer group norms moderate the expression of genetic risk for aggression?

Purpose

Using a genetically informed design based on 192 Monozygotic and Dizygotic twin pairs assessed in kindergarten, this study examined whether the expression of genetic risk for physical aggression or for relational aggression varies depending on the peer group’s injunctive behaviour norms.

Methods

Physical aggression and relational aggression, as well as injunctive peer group norms in regard to these behaviours, were measured via peer nominations in the twins’ kindergarten classes.

Results

Peer groups varied considerably in terms of the level of acceptability of both physical and relational aggression. Bivariate Cholesky modeling revealed a significant gene-environment interaction, indicating that a strong genetic disposition for physical aggression was much more likely to be expressed when peer group injunctive norms were favourable to such behaviour. In contrast, genetic factors essentially played no role in explaining inter-individual differences when peer group norms discouraged physical aggression. Relational aggression was generally less explained by genetic influences and more by environmental influences regardless of peer group norms, but environmental influences became even more important when peer group norms favoured such behaviour.

Conclusions

These findings speak to the importance of the peer group in shaping aggression already in young children by either condoning or penalizing such behaviour.     

Sex as a moderator and perceived peer pressure as a mediator of the externalizing-delinquency relationship: A test of gendered pathways theory

Purpose

The current study sought to determine whether sex moderated peer mediation of the externalizing-delinquency relationship as part of a larger test of the gendered pathways theory of crime.

Methods

Data gathered from 4,144 (2,079 males and 2,065 females) members of the National Longitudinal Survey of Youth-Child sample were subjected to simple correlational and moderated mediation analysis.

Results

Externalizing behavior and delinquency correlated equally in boys and girls but in testing a full moderated mediation model it was discovered that sex moderated the mediating effect of perceived peer pressure on the externalizing–delinquency relationship. Whereas externalizing behavior predicted delinquency in both boys and girls, perceived peer pressure only mediated the externalizing-delinquency relationship in boys.

Conclusions

These results support the gendered pathways to delinquency model to the extent that the relationship between childhood externalizing behavior and delinquency was mediated by perceived peer pressure in males but not females. The implications of these results for theoretical refinement of the gendered pathways approach and crime prevention and intervention are discussed.     

Changes in self-control during adolescence: Investigating the influence of the adolescent peer network

Purpose

Previous research on changes in self-control during adolescence provides evidence of stability for most individuals but change for some, drawing attention to the role of factors that may account for change. We contribute to this area of research by examining the extent to which changes in peer self-control and peer delinquency within peer networks is related to individual self-control during adolescence.

Method

This study uses longitudinal social network data from three waves of the NSCR School Project to construct growth curve models of self-control and MLM models to examine the factors that contribute to changes in self-control.

Results

Growth curve models demonstrate within and between-individual differences in changes to self-control that occur between ages 12-17. Furthermore, multilevel models reveal that changes in levels of self-control and delinquency among respondent's peers are related to between-individual differences and within-individual changes in self-control, net of parental social control.

Conclusions

This study finds that self-control continues to evolve during adolescence as a result of processes that take place within adolescent peer-networks, calling into question Gottfredson and Hirschi's contention that peers are inconsequential for explaining differences in self-control across individuals.     

The genetic and environmental overlap between aggressive and non-aggressive antisocial behavior in children and adolescents using the self-report delinquency interview (SR-DI)

Purpose

This study investigated genetic and environmental commonalities and differences between aggressive and non-aggressive antisocial behavior (ASB) in male and female child and adolescent twins, based on a newly developed self-report questionnaire with good reliability and external validity -- the Self-Report Delinquency Interview (SR-DI).

Methods

Subjects were 780 pairs of twins assessed through laboratory interviews at three time points in a longitudinal study, during which the twins were: (1) ages 9-10 years; (2) age 11-13 years, and (3) age 16-18 years.

Results

Sex differences were repeatedly observed for mean levels of ASB. In addition, diverse change patterns of genetic and environmental emerged, as a function of sex and form of ASB, during the development from childhood to adolescence. Although there was some overlap in etiologies of aggressive and non-aggressive ASB, predominantly in shared environmental factors, their genetic overlap was moderate and the non-shared environmental overlap was low.

Conclusions

Taken together, these results reinforced the importance of differentiating forms of ASB and further investigating sex differences in future research. These results should be considered in future comparisons between youth self-report and parental or teacher report of child and adolescent behavior, and may help elucidate commonalities and differences among informants.     

Does the measurement of peer deviance change the relationship between self-control and deviant behavior? An analysis of friendship pairs

Purpose

The measurement debate between social learning and self-control theories has predominantly focused on self-control, leaving an unexplored and equally important measurement controversy concerning the operationalization of the peer delinquency construct. This study addresses how self-control's relationship with deviant and criminal behavior changes when peer deviance is statistically controlled for using an indirect, perceptual measure or a self-report directly from a peer.

Methods

Data from 796 friendship pairs are used to estimate a series of regression models that regress respondent deviance onto indirect and direct peer deviance and attitudinal and behavioral self-control measures while controlling for elements of the social bond and demographic characteristics.

Results

When an indirect measure of peer delinquency is replaced with a direct measure from respondents’ friends, the relationships between self-control - attitudinal and behavioral measures - and deviance and criminal behavior are consistently larger. The use of a direct peer deviance measure does not prove the peer deviance-crime relationship spurious, but does substantially weaken the relationship between self-control and deviance and criminal behavior.

Conclusions

The strength of the relationship between self-control and deviant/criminal behavior is contingent on how peer deviance is operationalized, regardless of how self-control is measured (attitudinally or behaviorally).     

An investigation into the empirical relationship between time with peers,friendship, and delinquency

Purpose

Much of the research on peer influence has examined the relationship between peer associations and delinquency. Relatively little empirical research has addressed the effects of delinquent behavior on peer intimacy and time spent with peers. Our research attempts to fill these gaps in the literature as we hypothesize that, net of peer delinquency, delinquents spend more time with their peers but are less closely attached to their peers.

Methods

Using data from two waves of the National Youth Survey (NYS), we present two sets of regression models to account for selection bias resulting from whether respondents reported having friends. To assess the stability of our findings, we supplement our presented findings with extensive use of alternate estimation strategies.

Results

Conclusions regarding our hypotheses do not vary by estimation strategy. Delinquents spend more time with their peers, but delinquents and non-delinquents do not report differences in closeness to their peers.

Conclusions

Given our control variables, our finding introduces complexity in the causal priority between time spent with peers and delinquency. Prior delinquency may be a predictor of more time with peers, but partly as an avenue for opportunities for crime, not for the sake of friendship.     

The persistence of early childhood physical aggression: Examining maternal delinquency and offending,mental health,and cultural differences

Purpose

To examine the persistence of physical aggression in preschoolers and associated correlates (i.e., socio-demographic, socioeconomic, criminality, parenting practices, maternal mental health).

Methods

One-year follow-ups are completed with 240 mothers and their preschool children (boys and girls) from the Vancouver Longitudinal Study on the Psychosocial Development of Children. A series of structural equation models are examined.

Results

Maternal psychological symptoms, juvenile delinquency, and adult offending are associated with higher levels of physical aggression in their offspring. Children of non-Caucasian mothers and those born outside of North are less physically aggressive. Cultural differences in the correlates of physical aggression were identified.

Conclusions

Maternal past delinquency, current adult offending, and mental health are important factors in the development of children’s physical aggression. The findings suggest that there are multiple pathways leading to chronic physical aggression, which may be culturally-based. Cultural differences should be taken into account when developing programs and intervening with families of children with behavioral problems.     

Do school disciplinary policies have positive social impacts? Examining the attenuating effects of school policies on the relationship between personal and peer delinquency

Purpose

Empirical research has yet to demonstrate that strict school disciplinary policies deter student misconduct. However, underlying the null and negative effects observed in prior research may be competing social impacts. What is missing from prior research is an acknowledgement that the deviance amplification effects of criminogenic risk factors may be partially offset by the general deterrence effects of strict school sanctions.

Methods

Using data from the school administrator questionnaire, the in-school interview, and the in-home interview from the National Longitudinal Study of Adolescent Health, this study employs logistic hierarchical models to investigate whether strict school sanctions condition the relationship between personal and peer smoking, drinking, and fighting.

Results

Results indicate that the effects of peer smoking, drinking, and fighting on corresponding respondent delinquency are attenuated in schools with strict sanction policies for these behaviors.

Conclusions

Results suggest that school policies can aid in preventing crime in unanticipated ways, for example, by reducing the crime-inducing effects of having delinquent peers. Prior research may therefore be unintentionally discounting the general deterrence effects of school disciplinary policies by neglecting the moderating mechanisms through which these policies operate.     

The influence of strain on law enforcement legitimacy evaluations

Purpose

While law enforcement officers have the state-sanctioned authority to use force as a way to ensure citizen obedience with the law, research has found that when private citizens evaluate the police as legitimate, they are more likely to comply with legal demands and cooperate with the police. Although procedural justice has shown to be a highly significant predictor of perceived police legitimacy, research has found other correlates of this outcome, including ethnic identity, low self-control and structural economic disadvantage. To date, no study has explored whether strain influences perceptions of the legitimacy of law enforcement.

Methods

A series of linear regression equations was estimated using survey data collected from a convenience sample of college students to determine the effect of strain on perceived police legitimacy.

Results

Even after controlling for procedural justice, strain exerted a negative and statistically significant influence on law enforcement legitimacy evaluations.

Conclusions

Police officers are encouraged to interact with citizens in procedurally just manners and to also consider people's strain levels when enforcing the law.     

Teenage childbirth and young adult criminal convictions: A quasi-experimental study of criminal outcomes for teenage mothers

Purpose

Teenage childbirth is associated with poor psychosocial outcomes for teen mothers. One example is that teen mothers have higher rates of antisocial behavior. The extant research has not been able to determine if teenage motherhood is independently associated with criminal behavior, or if the association is due to selection factors associated with both teenage childbirth and criminal behavior.

Methods

We used longitudinal data from Swedish national registers and sibling-comparisons (both full- and half-siblings) to identify the extent to which there is an independent association between teenage childbirth and mothers’ likelihood of criminal conviction between ages 20-30, or if the association is confounded by familial (including genetic or environmental) factors that make sisters similar.

Results

Women who began childbearing as teenagers were more likely to be convicted of a crime in young adulthood compared to women who delayed childbearing. When sisters were compared, the association between teenage childbirth and criminal convictions disappeared. Multivariate behavior genetic analyses suggest genetic and shared environmental account for the association.

Conclusions

The statistical association between teenage childbirth and early adulthood criminal convictions is confounded by genetic and shared environmental factors that influence both the likelihood of teenage childbirth and risk of early adulthood criminal conviction.     

Preventing Crime is Hard Work: Early Intervention,Developmental Criminology,and the Enduring Legacy of James Q. Wilson

Objective

The late James Q. Wilson (1931-2012) was a prolific scholar and made many important contributions to the field of criminology. Less well known, however, is that Wilson was a great advocate of early prevention of delinquency and later offending. This essay examines this aspect of Wilson's overall contribution to criminology.

Materials and methods

Narrative review of Wilson's research and writings on early crime prevention and developmental criminology.

Results

Three key events delineate Wilson's long-lasting support for early crime prevention: his 1983 "Raising Kids" article with its special focus on family-based prevention; his help to initiate and champion developmental and longitudinal research on offending in the 1980s and 1990s; and his influential writings and behind-the-scenes work on early prevention throughout the 1990s and 2000s.

Conclusions

Wilson played an important role in advocating for early crime prevention. Without question, this is part of his enduring legacy to the field of criminology.