Randomized trial of prize-based reinforcement density for simultaneous abstinence from cocaine and heroin.

Randomized trial of prize-based reinforcement density for simultaneous abstinence from cocaine and heroin. Research Abstract Details 

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Randomized trial of prize-based reinforcement density for simultaneous abstinence from cocaine and heroin. Abstract Text:

Udi E Ghitza,David H Epstein,John Schmittner,Massoud Vahabzadeh,Jia-Ling Lin,Kenzie L Preston,Udi E Ghitza,David H Epstein,John Schmittner,Massoud Vahabzadeh,Jia-Ling Lin,Kenzie L Preston,Udi E Ghitza,David H Epstein,John Schmittner,Massoud Vahabzadeh,Jia-Ling Lin,Kenzie L Preston,

To examine the effect of reinforcer density in prize-based abstinence reinforcement, heroin/cocaine users (N = 116) in methadone maintenance (100 mg/day) were randomly assigned to a noncontingent control group (NonC) or to 1 of 3 groups that earned prize draws for abstinence: manual drawing with standard prize density (MS) or computerized drawing with standard (CS) or high (CH) density. Probabilities (prizes/draw) were standard (50%) and high (78%); prize density was double blind. Mean prize values were CH, $286; CS, $167; MS, $139; and NonC, $171. Outcomes were % opioid/cocaine-negative urines during the 12-week intervention and then 8 weeks postintervention as well as diagnosis of dependence up to 6 months poststudy. CH had significantly more negative specimens than did NonC during intervention and had more than all groups during postintervention treatment: Mean % negative (95% confidence interval) during postintervention treatment adjusted for baseline drug use and dropout were CH, 55% (14%-90%); CS, 7% (1%-27%); MS, 4% (1%-12%); and NonC, 3% (1%-10%). Current cocaine dependence diagnoses after treatment were significantly lower in contingent compared with noncontingent groups. Computerized drawing with higher-density prizes enhanced reduction of cocaine use; abstinence reinforcement had long-term therapeutic benefits.

Randomized trial of prize-based reinforcement density for simultaneous abstinence from cocaine and heroin. Publishing Authors By Initials

UE Ghitza,DH Epstein,J Schmittner,M Vahabzadeh,JL Lin,KL Preston,UE Ghitza,DH Epstein,J Schmittner,M Vahabzadeh,JL Lin,KL Preston,UE Ghitza,DH Epstein,J Schmittner,M Vahabzadeh,JL Lin,KL Preston,

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Randomized trial of prize-based reinforcement density for simultaneous abstinence from cocaine and heroin. Journal Published:

PUBLICATION TYPE: Research Support, N.I.H., Intr

Journal: Journal of consulting and clinical psychology

VOLUME: 75

Page Numbers: 765-74

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ISSN: 0022-006X

DAY: 2

MONTH: Oct

YEAR: 2007

Randomized trial of prize-based reinforcement density for simultaneous abstinence from cocaine and heroin. Information

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LANGUAGE: eng

NlmUniqueID: 136553

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AFFILIATION: Treatment Section, Clinical Pharmacology and Therapeutics Branch, Intramural Research Program (IRP), National Institute on Drug Abuse (NIDA), National Institute of Health (NIH), MD, USA. ghitzau@intra.nida.nih.gov

Country: United States

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MEDLINETA: J Consult Clin Psychol

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