Joah L. Williams

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Posttraumatic stress disorder (PTSD) and alcohol abuse both are negatively associated with health, and alcohol misuse may mediate the relationship between PTSD and functional health outcomes. The present study tested for such mediation using self-report measures of PTSD symptoms, hazardous alcohol use, and health functioning in 151 U.S. veterans (136 men(More)
OBJECTIVE The purpose of this study was to test the efficacy of 2 brief interventions for alcohol misuse in a sample of combat veterans of the wars in Iraq and Afghanistan. METHOD Participants were 68 combat veterans (91.2% male; 64.7% White, 27.9% Black) with a mean age of 32.31 years (SD = 8.84) who screened positive for hazardous drinking in a Veterans(More)
Two experiments explored the role of vicarious “self” explanations in facilitating student learning gains during computer-presented instruction. In Exp. 1, college students with low or high knowledge on Newton’s laws were tested in four conditions: (a) monologue (M), (b) questions (Q), (c) explanation (E), and (d) question þ explanation (Q þ E). Those with(More)
Although DSM-IV-TR diagnostic criteria for posttraumatic stress disorder (PTSD) include three primary symptom clusters, recent evidence from confirmatory factor analyses suggest that the latent structure of PTSD is better represented by four factors, which will likely be reflected in the upcoming DSM-5. Given this likely transition from three to four(More)
Hazardous drinking among US Military combat veterans is an important public health issue. Because recent combat veterans are difficult to engage in specialty mental health and substance abuse care, there is a need for opportunistic interventions administered in settings visited by recent combat veterans such as primary care. This paper describes a brief(More)
Combat traumas precipitate PTSD, however non-traumatic deployment and post-deployment factors may also contribute to PTSD severity. The Deployment Risk and Resilience Inventory was used to investigate pre, peri and post-deployment factors associated with current PTSD severity in 150 recent combat veterans with PTSD and hazardous alcohol use. Hierarchal(More)
The current study investigated the role of discourse scaffolds embedded into vicarious learning environments in classroom learning. In the current study, one of three vicarious learning conditions with varying levels of discourse scaffolds preceded standard instruction on seven classroom days. An explanation condition included deep questions, course content(More)
Motor vehicle crashes (MVCs) are a leading cause of physical injuries and mortality among children and adolescents in the United States. The purpose of this study was to examine associations between having an MVC and mental health outcomes, including posttraumatic stress disorder (PTSD), depression, and drug and alcohol misuse in a nationally representative(More)
Elevated alcohol reward value (RV) has been linked to higher levels of drinking and alcohol-related consequences, and there is evidence that specific drinking motives may mediate the relationship between demand and problematic alcohol use in college students, making these variables potentially important indicators of risk for high RV and alcohol problems.(More)