Carl G. Leukefeld

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The present study examined Widiger and Lynam's (1998) hypothesis that psychopathy can be represented using the Five-Factor Model (FFM) of personality. Participants in the study consisted of 481 21-22-year-old men and women who are part of an ongoing longitudinal study. Psychopathy was assessed by the degree of similarity between an individual's NEO-PI-R and(More)
The present study takes a developmental approach to subgrouping and examines the trajectories of substance use from early adolescence through young adulthood among a community sample of 481 individuals. The patterns of use were examined, subgroups were identified separately for men and women and for alcohol and marijuana, and psychosocial predictors and(More)
This article is focused on examining social and contextual factors related to HIV-risk behavior for women. Specifically, this article has three main purposes: to review the literature on selected social and contextual factors that contribute to the risk for the heterosexual transmission of HIV and AIDS, to review and conduct a meta-analysis of(More)
The physical, emotional, and financial consequences of engaging in risky sexual behavior can be extremely high. This paper explores the relations between the Five Factor Model (FFM) of personality and a variety of risky sexual behaviors using a community sample of 481 individuals who are part of an ongoing longitudinal study. More specifically, we examined(More)
The present study examined the impact of Project DARE (Drug Abuse Resistance Education), a widespread drug-prevention program, 10 years after administration. A total of 1,002 individuals who in 6th grade had either received DARE or a standard drug-education curriculum, were reevaluated at age 20. Few differences were found between the 2 groups in terms of(More)
Adolescent marijuana use has tripled recently, and the once-noted race gap between African American and Caucasian adolescents in marijuana use appears to have disappeared. Yet, relatively little research has examined marijuana use among African American adolescents. In this study, we examined developmental trajectories of marijuana use among Caucasian and(More)
BACKGROUND Fatal overdoses involving prescription opioids have increased significantly in recent years in the United States--especially in rural areas. However, there are scant data about non-fatal overdose among rural drug users. The purpose of this study is to examine the prevalence and correlates of non-fatal overdose and witnessed overdose among rural(More)
Non-medical drug use in rural communities in the United States is a significant and growing public health threat. Understanding what motivates drug users in rural areas to seek substance abuse treatment may help in addressing the problem. Perceived need for treatment, a construct indicative of problem recognition and belief in problem solution, has been(More)
There is a limited but growing literature which suggests that stalking is a variant of intimate violence. The purpose of this study was to examine physical, psychological, and stalking victimization and perpetration among males and females. Alcohol use was also examined. The sample was 46 male and 84 female undergraduate students who reported stalking(More)
Alcohol and other drug use has been associated with traumatic brain injury both as a contributing factor to the injury and as a complicating factor for rehabilitation. Brain injury is associated with an increase in mental health and other problems that may be related to drug and alcohol abuse and that may influence recovery. This study examined self-reports(More)