Table 2.

Behavioral results from 30 methamphetamine (MA) abusers and 30 control subjects.

	Methamphetamine Abusers (n =30)	Control Subjects (n = 30)
Within-Trial Stroop Effects, median (SD)s (msec)
Incongruent	767.6 (140.7)	752.5 (156.9)
Congruent	629.4 (80.1)	626.7 (118.8)
Stroop Conflict Effect	138.2	125.8
Conflict Errors	.05 (.04)	.07 (.07)
Non Conflict Errors	.02 (.02)	.03 (.05)
Trial to Trial RT adjustments median (SD)s (msec)
Congruent-Incongruent (cI)	765.5 (140.2)	765.4 (167.2)
Incongruent-Incongruent (iI)	769.7 (147.1)	739.7 (150.2)
Trial to Trial Adjustment (cI-iI)	− 4.2†	25.8

^† Significantly different from control group.