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Mean (1 SE) reported craving for heroin (a), reported craving for cocaine (b), reported negative affect (c), and drug Stroop effect (ms) (d) as a function of assessment type (RA vs. TA) and time before TA (see text for details). Data shown are raw (uncorrected) means. RA random assessment, TA temptation assessment. *Significant difference vs. control RAs (p<0.05)
