Table 1.

Performance on component tests of the neuropsychological assessment battery at treatment entry and at each follow up.

Neuropsychological test	Treatment entry			6-week follow up			26-week follow up			52-week follow up
	N	M	SD	N	M	SD	N	M	SD	N	M	SD
Shipley Institute of Living Scale, Vocabularya	196	27.5	6.6	158	28.1	6.3	119	28.2	6.4	123	28.3	6.6
Shipley Institute of Living Scale, Abstractiona	196	20.0	10.1	161	21.6	10.0	143	21.6	10.5	140	22.6	10.2
Word Fluency Testa	195	34.7	12.4	162	37.7	13.5	142	37.5	12.3	139	38.2	13.2
Active-Passive Test, affirmative syntaxb	193	2.7	1.0	158	2.5	0.9	136	2.4	0.9	135	2.3	0.8
Active-Passive Test, negative syntaxb	193	3.8	1.7	158	3.3	1.4	136	3.3	1.5	135	3.1	1.3
Booklet Category Testd*	196	72.3	30.7	155	58.5	31.5	128	53.1	30.7	119	47.4	28.8
Stroop Color-Word Testa,c	162	34.9	12.5	135	39.4	12.3	118	40.1	12.8	115	42.0	13.5
Wisconsin Card Sorting Teste	161	5.6	6.2	132	5.0	6.3	95	4.3	5.0	104	3.9	5.0
Digit Symbol Substitution Testa	166	47.2	15.7	136	50.4	16.1	120	50.7	16.2	101	53.1	16.4
Trail Making Test, Part Ab	196	37.6	21.3	162	34.5	18.9	145	33.3	17.9	143	34.3	21.9
Trail Making Test, Part Bb	195	101.3	72.0	160	91.7	58.4	142	91.7	65.5	141	85.9	59.3
California Verbal Learning Testa,	190	9.0	3.5	158	10.3	3.4	145	10.8	3.6	137	10.9	3.6
Product Recall Testa	196	8.0	3.3	161	10.3	2.8	142	10.6	2.8	141	9.9	3.3
Digit Symbol Substitution Test, symbols recalleda	166	5.2	2.8	137	6.0	2.8	119	6.1	2.8	116	6.3	2.9
Tower of Hanoib	166	125.0	88.2	136	88.9	66.4	116	78.8	57.7	116	78.6	58.4

^aNumber correct,

^btime,

^cparticipants were screened for color blindness,

^derrors,

^eperseveration errors.

*The brief version of this test was used (78).

These data represent a combined mean from the highly correlated long and short delay trials of the CVLT. This mean was then used as a measure of verbal memory in the structural equation model.