Table 4.

Latent Structure of the 18 Cognitive Scales: Confirmatory Factor Analysis Solution Using the Cross-Validation Sample (N =650) and Subgroups of Interest within the Same Sample

Scale	Factor Loadings
	Verbal Ability									Visuo-Spatial Ability									Speed & Executive Function
	All	Male	Fem	Young	Old	AD+	AD−	AD+ APOE+	AD− APOE−	All	Male	Fem	Young	Old	AD+	AD−	AD+ APOE+	AD− APOE−	All	Male	Fem	Young	Old	AD+	AD−	AD+ APOE+	AD− APOE−
WASI -Vocabulary	0.88	0.89	0.87	0.84	0.90	0.88	0.86	0.88	0.87
WRAT-Reading	0.79	0.83	0.76	0.79	0.79	0.78	0.79	0.80	0.76
WASI -Similarities	0.71	0.77	0.68	0.65	0.76	0.71	0.71	0.60	0.77
Boston Naming	0.54	0.53	0.54	0.57	0.51	0.55	0.48	0.53	0.44
Fluency	0.49	0.56	0.46	0.48	0.51	0.47	0.55	0.48	0.55
WASI -Block Design										0.80	0.80	0.79	0.78	0.79	0.81	0.76	0.76	0.78
Benton JLO										0.59	0.56	0.62	0.59	0.63	0.60	0.58	0.52	0.55
WASI -Matrix Reasoning										0.71	0.75	0.70	0.70	0.68	0.74	0.61	0.71	0.60
Stroop CW																			0.52	0.51	0.53	0.49	0.47	0.55	0.47	0.54	0.49
Trail Making A																			−0.57	−0.55	−0.57	−0.58	−0.52	−0.57	−0.57	−0.63	−0.58
Trail Making B																			−0.85	−0.81	−0.86	−0.91	−0.82	−0.87	−0.81	−0.88	−0.80
WAIS -Digit Span-Forward
WAIS -Digit Span-Backward
WAIS –Letter-number sequencing
Rey AVLT Trial 3
Rey AVLT Trial 4
Rey AVLT Trial 5
Delayed Recall
Factor Determinacies	0.95	0.95	0.93	0.93	0.95	0.94	0.93	0.94	0.94	0.90	0.90	0.90	0.89	0.89	0.91	0.87	0.89	0.87	0.89	0.89	0.90	0.93	0.87	0.91	0.88	0.91	0.88

Scale	Factor Loadings
	Working Memory									Verbal Learning & Memory
	All	Male	Fem	Young	Old	AD+	AD−	AD+ APOE+	AD− APOE−	All	Male	Fem	Young	Old	AD+	AD−	AD+ APOE+	AD− APOE−
WASI -Vocabulary
WRAT-Reading
WASI -Similarities
Boston Naming
Fluency
WASI -Block Design
Benton JLO
WASI -Matrix Reasoning
Stroop CW
Trail Making A
Trail Making B
WAIS -Digit Span-Forward	0.70	0.70	0.70	0.75	0.64	0.73	0.71	0.67	0.67
WAIS -Digit Span-Backward	0.74	0.76	0.72	0.76	0.73	0.71	0.76	0.77	0.75
WAIS –Letter-number sequencing	0.71	0.76	0.68	0.69	0.73	0.72	0.68	0.77	0.65
Rey AVLT Trial 3										0.79	0.83	0.75	0.77	0.80	0.79	0.78	0.79	0.80
Rey AVLT Trial 4										0.88	0.89	0.87	0.87	0.89	0.88	0.89	0.86	0.88
Rey AVLT Trial 5										0.87	0.91	0.85	0.87	0.87	0.88	0.87	0.87	0.88
Delayed Recall										0.82	0.82	0.80	0.80	0.83	0.81	0.84	0.72	0.85
Factor Determinacies	0.90	0.91	0.88	0.90	0.880.90		0.89	0.90	0.88	0.96	0.96	0.95	0.95	0.96	0.96	0.96	0.95	0.96