TABLE 1.

Summary of Results

Instrument	Index	Addict	Control	Significance, P =	t(22) =	ANCOVA, P =
Anagrams	In (total)	47.6	41.2	0.043	2.150	0.010
	In (5 letter)	15.4	11.5	0.010	2.824	0.001
WCST	Tries	108.3	84.7	0.010	2.812	0.009
	% correct	81.3	67.7	0.025	−2.397	0.638
	Preservative errors	26.7	9.58	0.016	2.606	0.043
	Failure to maintain set	1.4	0.5	0.051	2.069	0.018
COWA	Total words, F-A-S	37.0	46.4	0.024	−2.432	0.030
	Animals named	20.8	23.9	0.099	−1.723	0.063
Stroop	Word naming	104.6	116.6	0.121	−1.615	NA
	Color naming	69.9	83.5	0.008	−2.981	0.007
	Color–word	41.8	47.8	0.076	−1.865	0.006
	Interference	−0.068	−0.763	0.819	0.232	NA
Rey CFT	Copy score	35.1	36.0	0.305	−1.051	NA
	3-min recall	22.5	22.7	0.957	−0.054	NA
	30-min recall	21.8	23.0	0.689	−0.406	NA
CVLT	List A recall, trial 1	6.7	9.4	0.013	−2.713	0.040
	List A recall, trial 5	12.5	14.8	0.004	−3.189	0.020
	List A total, trials 1–5	51.8	63.3	0.010	−2.837	0.026
	List B recall	5.7	8.9	<0.0005	−5.101	0.001
	Short free recall	10.1	13.6	0.002	−3.614	0.015
	Short cued recall	11.7	14.3	0.006	−3.046	0.013
	Long free recall	11.5	14.1	0.006	−3.063	0.009
	Long Cued recall	12.1	14.6	0.005	−3.137	0.014