PROJECT RESIN: This study is examining the reliability, validity, and acceptability of a novel visual scale for estimating daily methamphetamine use among people who use methamphetamine.
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Reliability - Timeline Follow-back
Timeframe: Conducted at enrollment (V0) and follow-up (V1) to record meth use 30 days from those dates. The data will be collected as amount per day for 30 days.
Validity - Hair Sample
Timeframe: Hair sample will be collected at the enrollment visit
Validity - Weighted Surrogate Assessment
Timeframe: At enrollment visit (V0) and at follow-up visit (V1). The data will be collected as amount per day for the most recent day of use.
Acceptability Questionnaire
Timeframe: Follow-up visit (V1). The questionnaire will cover the time frame of the study, which will be 7-14 days.