Prior problem behavior accounts for the racial gap in school suspensions

Purpose

A large body of empirical research finds a significant racial gap in the use of exclusionary school discipline with black students punished at rates disproportionate to whites. Furthermore, no variable or set of variables have yet to account for this discrepancy, inviting speculation that this association is caused by racial bias or racial antipathy. We investigate this link and the possibility that differential behavior may play a role.

Methods

Using data from the Early Childhood Longitudinal Study, Kindergarten Class (ECLS-K), the largest sample of school-aged children in the United States, we first replicate the results of prior studies. We then estimate a second model controlling for prior problem behavior.

Results

Replicating prior studies, we first show a clear racial gap between black and white students in suspensions. However, in subsequent analyses the racial gap in suspensions was completely accounted for by a measure of the prior problem behavior of the student – a finding never before reported in the literature.

Conclusions

These findings highlight the importance of early problem behaviors and suggest that the use of suspensions by teachers and administrators may not have been as racially biased as some scholars have argued.     

The association between psychopathic personality traits and health-related outcomes

Purpose

Psychopathy and psychopathic personality traits (PPT) have been linked to a long list of negative life outcomes. To date, however, few studies have provided a systematic analysis of whether psychopathic personality traits contribute to increased health burden. The current study was designed to address this gap in the literature.

Method

This study analyzed data from the National Longitudinal Study of Adolescent Health and employed a measure of PPT derived from the five-factor model of personality. Analyses were conducted using OLS, logistic, and Poisson regression techniques.

Results

The results revealed that relatively higher scores on psychopathic personality traits were associated with a slight increase in a wide range of negative health outcomes. These significant associations were detected for both males and females.

Conclusions

We speak to the importance of these findings for the potential to reduce health burden among psychopaths and those who score relatively high on measures of psychopathic personality traits.     

A biosocial analysis of the sources of missing data in criminological research

Purpose

Failing to deal with missing data patterns effectively may result in biased parameter estimates and ultimately may produce inaccurate results and conclusions. The vast majority of criminological research has addressed this issue with listwise deletion (LD) and multiple imputation (MI) techniques. Identifying the specific covariates that directly contribute to patterns of missingness is highly important in deciding which technique to use. One of the more surprising omissions from the identified list of covariates is the potential role of genetic influences in the development of missingness.

Methods

The current study addresses this gap in the literature by estimating genetic (A), shared environmental (C), and the nonshared environmental (E) influences on missingness across measures of delinquency and self-control within a longitudinal sample of twin and sibling pairs.

Results

The results indicated that genetic influences explain a significant portion of the variance in missing values related to both delinquency and self-control.

Conclusions

Current methodological techniques aimed at addressing missing data should be amended to take genetic influences into account. Such modifications and the implications of the findings for future research are discussed.     

Self-Control Theory and Nonlinear Effects on Offending

Objectives

This paper examines Gottfredson and Hirschi’s (A general theory of crime. Stanford University Press, Stanford, 1990) self-control theory and develops theoretical arguments for why self-control may have a differential effect on offending depending on the level of self-control.

Methods

We test the argument that the association between self-control and violent offending (n = 5,681) and non-violent offending (5,672) is nonlinear by using generalized propensity score analyses of data from the National Longitudinal Study of Adolescent Health.

Results

The results indicate that self-control and offending are nonlinearly related in a manner that involves two thresholds. Specifically, among individuals at the high end of the self-control spectrum, there was little evidence of an association between variation in self-control and offending. However, among individuals in the middle part of the self-control spectrum, a positive association obtained—that is, the greater the level of low self-control, the greater the likelihood of offending. Finally, among individuals at the low end of the self-control spectrum, there was, once again, little evidence of an association.

Conclusions

A nonlinear association between self-control and offending may exist and have implications for self-control theory and tests of it. Studies are needed to investigate further the possibility of a nonlinear association and to test empirically the mechanisms that give rise to it.     

An empirical examination of adolescence-limited offending: A direct test of Moffitt's maturity gap thesis

Purpose

Provide the first direct test of Moffitt's (1993) hypothesis linking the maturity gap with adolescent delinquency.

Methods

Data were drawn from the National Longitudinal Study of Adolescent Health (Add Health) and a direct measure of the maturity gap was constructed. Negative binomial regression models—survey-corrected to account for the Add Health research design—were estimated.

Results

Consistent with Moffitt's theory, the results of the analyses revealed that the maturity gap was predictive of minor forms of delinquency and drug use but not of more serious types of offending behaviors for males. Findings were less supportive of Moffitt's hypothesis for females.

Conclusions

Moffitt's maturity gap thesis is a viable explanation of adolescent delinquency, especially for males. This portion of the theory, which has largely gone unexamined, warrants further inquiry from criminologists.     

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.     

Evidence of a gene x environment interaction in the creation of victimization: results from a longitudinal sample of adolescents

A large body of research has revealed that aggressive personality traits and violent criminal behaviors are influenced by genetic factors. Surprisingly, however, no research has been devoted to investigating the potential genetic origins to adolescent victimization. In the current study, the authors address this gap in the literature by using data from the National Longitudinal Study of Adolescent Health (Add Health) to examine whether different variants of the dopamine D2 receptor gene (DRD2) are related to victimization, net of the effects of environmental measures. The results of the multivariate models revealed a significant gene X environment interaction in the creation of victimization for White males. Specifically, DRD2 interacted with delinquent peers to predict victimization. The authors discuss the implications of these findings.