Self-injurious and aggressive behaviors are common in fragile X syndrome (FXS). However, little is known about the persistence of these behaviors and associated risk markers. We established the prevalence and persistence of self-injurious and aggressive behaviors over eight years in males with FXS, and associations with risk markers. Results…

Despite broad consensus that most juvenile crimes are committed with peers, many questions regarding developmental and individual differences in criminal style (i.e., co-offending vs. solo offending) remain unanswered. Using prospective 3-year longitudinal data from 937 14- to 17-year-old serious male offenders, the present study investigates…

This study examined whether coping moderated the impact of community violence exposure (CVE) on violent behavior among 285 urban African American and Latino adolescent males assessed annually across 5 years. Composites indicating overall CVE (having knowledge of others' victimization, witnessing violence, direct victimization) and approach to…

Research examining the relationship between internalizing symptoms and antisocial behaviors has generally been cross-sectional in design. Thus, although extant data have substantiated a strong correlation between internalizing symptoms and antisocial behaviors, few studies have focused on describing the nature of the co-occurrence over time. This…

The relations of children's (n=214 at Time 1; M age=6 years at Time 1) dispositional sympathy to adult-reported and behavioral measures of effortful control (EC) and impulsivity were examined in a longitudinal study including five assessments, each two years apart. Especially for boys, relatively high levels of EC and growth in EC were related to…

Explored the relationship between youthful subculture attitudes toward hedonism, immediate gratification, and drug use in a longitudinal study of California youths (N=23 and N=72). Specific attitude measures indicated no relationship between degree of drug use and youth subculture attitudes. (JAC)

Research has consistently shown that among the non-institutionalized elderly, prevalence rates of heavy alcohol use and problem drinking are relatively small in comparison to younger age groups. This study examines how maximum annual alcohol consumption and problem drinking change as a concomitant of the aging process. This study of alcohol-use…

Examined a series of decisions made by 95 subjects over a period of 18 years. Results indicated that decisions made at earlier stages of development are more likely to be of an exploratory nature and decisions made at later stages are more likely to be of a terminal nature. (Author)

Using a sample of adjudicated French Canadian males from the Montreal Two Samples Longitudinal Study, this article investigates individual and social characteristics associated with differential cost avoidance. The main objective of this study is to determine whether such traits are randomly distributed across differential degrees of cost…

Examined the theoretically predicted adult career outcomes of individuals who engage in different developmental patterns of commitment to choice. Results indicated minimal support for the hypothesis that those who engage in increasing commitment and who do not revert to earlier behaviors would experience the most desirable outcomes in adulthood.…

The aims of this study were to: (a) compare physical activity across two seasons and, within those seasons, across school and vacation time, and (b) compare the proportion of children meeting the activity thresholds recommended by Tudor-Locke et al. (2004) at each time point. Thirty-six boys, between the ages of 8 and 10 years (M age = 8.8 years,…

A longitudinal study of the maturing of 68 professional and managerial men provided adolescent and adult test, questionnaire, and interview data about their personalities and competence that were predictive of their vocational adaptation. (Author)

Possible explanatory theories of the relationship between broken homes and crime include the following: (1) broken homes lead to crimes if there are "catalytic agents"; (2) broken homes lead to crime if these homes fail to provide certain conditions which promote socialization; and (3) broken homes and crime have a common source, but not…

This paper presents new information about the relationship between truancy in both elementary and high school. It is based on a sample of St. Louis black schoolboys. In this longitudinal study, school records were obtained and scored with respect to attendance. The effect of truancy was examined on four adult outcomes: earnings of less than…

Adaptive behavior in mentally retarded males with fragile X syndrome was longitudinally examined in 17 subjects, ages 1 to 17. Findings included relative strength in daily living skills and weakness in socialization only for older subjects, and significant declines in adaptive behavior scores from first to second testing for the older subjects.…