Background: High attrition among research participants undermines the validity and generalizability of field research. This study contrasted two incentivizing methods-money orders (MOs) or rechargeable incentive cards (RICs)-with regard to rates of participants' study engagement and follow-up contact over a 6-month period.
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- 1 Department of Psychiatry and Biobehavioral Sciences, UCLA , Los Angeles , California , USA.
- 2 School of Public Policy, Pepperdine University , Malibu , California , USA.
- 3 Department of Criminology, Law and Society, UC Irvine , Irvine , California , USA.
- Subst Use Misuse. 2016 Mar 23:1-6.
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