NCT00158197

Long-term Behavior Change - 1

Behavior Change: Reinforcement Schedule Effects

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 119 (actual)
• Sponsor: Friends Research Institute, Inc. · Academic / Other
• Sex: All
• Age: 18 Years – 65 Years
• Healthy volunteers: Not accepted

Summary

The purpose of this study is to determine if different reinforcement procedures (i.e., schedules) produce different patterns of long-term abstinence from methamphetamine. We anticipate that the three contingency management conditions will promote longer periods of abstinence in the year following treatment relative to the standard control group. Furthermore, we predict that the intermittent reinforcement procedures will produce longer periods of continued abstinence (i.e., long-term behavior change) in the year following treatment than the continuous reinforcement procedure. Finally, we predict that the intermittent unpredictable schedule will produce longer lasting behavior change than the intermittent predictable schedule. Methamphetamine use will be measured using urine toxicology and self-report of methamphetamine use.

Detailed description

Briefly the four study conditions are: (1) standard treatment which consists of 16 weeks of psychosocial treatment, (2) continuous contingency management which consists of 16 weeks of psychosocial treatment with a contingency management procedure in effect during the first twelve weeks in which vouchers are made available after each provision of a methamphetamine-negative urine test, (3) intermittent predictable contingency management which consists of 16 weeks of psychosocial treatment with a contingency management procedure in effect during the first twelve weeks in which vouchers are available after the provision of every three consecutive methamphetamine-negative urine samples, and (4) intermittent unpredictable contingency management which consists of 16 weeks of psychosocial treatment with a contingency management procedure in effect during the first twelve weeks in which vouchers are available on one day each week (randomly selected after the first week) for the provision of methamphetamine-negative urine samples provided all urine samples since delivery of the last reinforcer were also methamphetamine negative.

Conditions

• Amphetamine-related Disorders

Interventions

Type	Name	Description
BEHAVIORAL	contingency management voucher	participants receive vouchers for the provision of methamphetamine-negative urines. Vouchers can be redeemed for goods and services compatible with non-drug using behaviors.

Timeline

• Start date: 2004-12-01
• Primary completion: 2008-06-01
• Completion: 2008-06-01
• First posted: 2005-09-12
• Last updated: 2015-08-25
• Results posted: 2014-07-02

Locations

2 sites across 1 country: United States