title: Impulsivity and risk-taking in co-occurring psychotic disorders and substance abuse.
abstract: Impulsivity is a risk-factor associated with substance use disorders. On paper-and-pencil measures, people with comorbid psychotic disorders and substance abuse have been shown to be more impulsive than their non-using counterparts. However, there has been little research on the behavioral components that, collectively, define the construct of impulsivity, which have been identified as: temporal discounting, risk taking, underestimating time, and failure to inhibit extraneous responding. This study compared people with psychotic disorders who did and did not use cocaine on behavioral measures of these components. One group (COC-now) had a positive urine drug screen (UDS) for cocaine (N=20). A second group (COC-past) had a negative UDS, but a positive cocaine history (N=20). Finally, the third group (control) had no history of cocaine use (N=20). Those with a current or past history of cocaine use engaged in more risk-taking behaviors and seemed to be less affected by anticipated loss and more attuned to monetary gains. However, contrary to our hypothesis, patients in the COC-now group selected larger, delayed rewards over the smaller, immediate rewards. Performance on the immediate/delay task also suggested greater attentiveness to the magnitude of the monetary reward for patients with a positive UDS.
authors.affiliation: University of Medicine and Dentistry of New Jersey, NJ, USA. marcelsc@umdnj.edu
authors.forename: Stephanie Marcello
authors.initials: SM
authors.lastname: Duva
authors.forename: Steven Michael
authors.initials: SM
authors.lastname: Silverstein
authors.forename: Ralph
authors.initials: R
authors.lastname: Spiga
mesh_terms: D000293:Adolescent; D000328:Adult; D000704:Analysis of Variance; D005260:Female; D006801:Humans; D007175:Impulsive Behavior / Q000145:classification / Q000209:etiology*; D008297:Male; D008875:Middle Aged; D009483:Neuropsychological Tests; D011618:Psychotic Disorders / Q000150:complications* / Q000175:diagnosis; D012309:Risk-Taking; D019966:Substance-Related Disorders / Q000150:complications* / Q000175:diagnosis / Q000652:urine; D055815:Young Adult