Table 2.

Neuropsychological outcomes

	Ruff TA	Ruff Speed	CPT Commission Errors	CPT RT	LNS	DKEFS I	DKEFS I/S
MJ Users	95.3 (16.1)	113.7 (24.4)	12.3 (6.2)	408.7 (56.9)	13.3 (3.3)	38.6 (7.7)	47.8 (8.5)
Controls	96.1 (14.6)	117.7 (24.0)	17.4 (8.9)	378.8 (58.9)	13.7 (2.5)	37.1 (9.0)	47.8 (12.1)

Note: Standard deviations are in parentheses. Ruff TA = Ruff Total Accuracy scores; CPT = Continuous Performance Task; CPT RT = Continuous Performance Task Reaction Time; LNS = Letter Number Sequencing; DKEFS I = Delis-Kaplan Executive Function System Color Word Interference Trial; DKEFS I/S = Delis-Kaplan Executive Function System Color Word Interference/Switching Trial.