Journal
CLINICAL PSYCHOLOGICAL SCIENCE
Volume 7, Issue 5, Pages 1109-1124Publisher
SAGE PUBLICATIONS INC
DOI: 10.1177/2167702619838480
Keywords
drug; substance problems; rewards; psychophysiology
Categories
Funding
- U.S. Army [W911NF-14-1-0018]
- National Institute on Drug Abuse [T32-DA037183]
- Ford Foundation
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Reward-deficit models of addiction posit weaknesses in reward sensitivity to be promotive of substance dependence, whereas the externalizing spectrum model views substance problems as arising in large part from a general disinhibitory liability. In the current study we sought to integrate these perspectives by testing for separate and interactive associations of disinhibition and reward dysfunction with interview-assessed substance use disorders (SUDs). Community and college adults (N = 199) completed a scale measure of trait disinhibition and performed a gambling-feedback task yielding a neural index of reward sensitivity, the Reward Positivity (RewP). Disinhibition and blunted RewP independently predicted SUDs and also operated synergistically, such that participants-in particular, men-with high levels of disinhibition together with blunted RewP exhibited especially severe substance problems. Though limited by its cross-sectional design, this work provides new information about the interplay of disinhibition, reward processing, and gender in SUDs and suggests important directions for future research.
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