Table 5.

Follow-up partial correlations between substance use variable and cognitive measures in marijuana users controlling for sex and IQ.

	Alcohol Usea	Tobacco Useb	Non-Marijuana Drug Usec
Letter Cancellation
Time	0.10	−0.20	0.32
COWAT – Verbal Fluency
Total words	−0.12	−0.16	0.03
Total set-loss errorsd	−0.21	−0.04	−0.32
RAVLT – Verbal Learning & Memory
Total Words: Trial 5	0.47*	−0.15	0.01
Total Words: Interference Trial List	0.50*	0.11	0.06
Total Words: Immediate Recall	0.56*	−0.23	< −0.01
Total Words: Delayed Recall	0.48*	−0.18	0.33
% of Learning Recalled During Delay	0.26	−0.18	0.43^
Delayed Consistency	0.48*	0.07	0.01
Spatial Delayed Response Task
Error: 8,000 ms delay	−0.40^	0.05	0.14
Reaction Time: 500 ms delay	−0.28	−0.29	0.01
Reaction Time: 8,000 ms delay	−0.30	−0.21	< −0.01
Tower of Londone
% Perfect Solutions	0.35	0.04	0.05
Average Moves 3	−0.40^	−0.24	−0.20
First move initiation time 5	−0.20	−0.17	−0.36^
Iowa Gambling Task
Good Choices-Bad Choices: Block 2	< −0.01	−0.13	−0.15
Good Choices-Bad Choices: Block 4	0.21	0.09	−0.08
Good Choices-Bad Choices: Block 5	−0.04	0.15	−0.18
Good Choices: Total	−0.21	−0.22	0.14
Deck1 Choices	0.05	−0.08	< 0.01
Deck 2 Choices	−0.20	−0.04	0.24
Deck 4 Choices	−0.06	0.09	−0.22

^aControlling for tobacco and non-marijuana drug use.

^bControlling for alcohol and non-marijuana drug use.

^cControlling for alcohol and tobacco use.

^dSquare root transformed.

^eData unavailable for 1 participant (n = 34).

^{^}p ≤ .05.

^*p ≤ .01.