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EFFECT OF REINFORCEMENT PROBABILITY AND PRIZE SIZE ON COCAINE AND HEROIN ABSTINENCE IN PRIZE‐BASED CONTINGENCY MANAGEMENT
Author(s) -
Ghitza Udi E.,
Epstein David H.,
Schmittner John,
Vahabzadeh Massoud,
Lin JiaLing,
Preston Kenzie L.
Publication year - 2008
Publication title -
journal of applied behavior analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 76
eISSN - 1938-3703
pISSN - 0021-8855
DOI - 10.1901/jaba.2008.41-539
Subject(s) - contingency management , abstinence , reinforcement , psychology , heroin , methadone , methadone maintenance , contingency , heroin dependence , outcome (game theory) , psychiatry , randomized controlled trial , clinical psychology , medicine , social psychology , drug , mathematics , linguistics , philosophy , mathematical economics , intervention (counseling)
Although treatment outcome in prize‐based contingency management has been shown to depend on reinforcement schedule, the optimal schedule is still unknown. Therefore, we conducted a retrospective analysis of data from a randomized clinical trial (Ghitza et al., 2007) to determine the effects of the probability of winning a prize (low vs. high) and the size of the prize won (small, large, or jumbo) on likelihood of abstinence until the next urine‐collection day for heroin and cocaine users ( N = 116) in methadone maintenance. Higher probability of winning, but not the size of individual prizes, was associated with a greater percentage of cocaine‐negative, but not opiate‐negative, urines.