Publications by authors named "James J Jaccard"

Objective: This study tested how individuals anticipate they will respond to opportunities to engage in simultaneous alcohol and marijuana (SAM) use.

Methods: Two studies utilizing a within-subjects design were conducted. Study 1 was conducted in Spring 2021 and a replication (Study 2) was conducted in Fall 2021.

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Background: Young adults have elevated rates of mental health disorders, yet they often do not receive consistent care. The challenge of continuing to engage young adults has been pervasive worldwide. Few engagement interventions have been designed for young adults with serious mental illness.

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The present study incorporated the behavioral alternative of abstinence into the Theory of Reasoned Action to test whether abstinence contributed to the prediction of intentions to use performance enhancing substances (PES). Adolescent athletes (N = 241) completed a questionnaire about the use of legal and illegal PES. Approximately 2.

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Purpose: The present study examined the relationship between high school sports participation and the use of anabolic steroids (AS) and legal performance-enhancing dietary supplements in young adulthood. Additionally, the relationship between the use of AS and legal dietary supplements was explored.

Methods: Data on approximately 15,000 adolescents from the National Longitudinal Study of Adolescent Health were used.

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