Table 4. Median Reaction Times and % Accuracy for Within-trial Stroop Conditions Across Groups.

	Reaction Time in msec (SD)	% Errors
Controls (n=38)
Incongruent	757 (94.0)	0.09 (.09)
Neutral	627 (72.1)	0.01 (.02)
Interference	130
Baseline reaction time	664 (104.8)
Short-term Abstinent MA Abusers (n=41)
Incongruent	852 (133.8)	0.10 (.09)
Neutral	675 (87.9)	0.01 (.01)
Interference	177 ††
Baseline reaction time	724 (138.4)
Long-term Abstinent MA Abusers (n=28)
Incongruent	780 (111.4)	0.07 (.04)
Neutral	649 (63.6)	0.01 (.01)
Interference	131
Baseline reaction time	684 (108.1)
SZ Patients (n=23)
Incongruent	900 (200.6)	0.07 (.07)
Neutral	780 (150.9)	0.02 (.02)
Interference	120
Baseline reaction time	808 (174)

^††Significantly different from control group and distant abstinent MA abusers at p < 0.01

MA indicates methamphetamine; SZ, schizophrenia.