. Author manuscript; available in PMC: 2010 Jan 8.

Published in final edited form as: J Int Neuropsychol Soc. 2009 Jul;15(4):558–569. doi: 10.1017/S1355617709090857

Table 5.

Statistics for Construct Validity Models for the Variables Hypothesized to reflect Cognitive Reserve in Sample 2

	Model
Variable	A	B	C	D
Fit statistics
X²	0	64.17	50.519	48.161
df	0	38	34	32
X²/df		1.69	1.49	1.51
CFI	1	0.98	0.99	0.99
RMSEA		0.040	0.034	0.034

Loadings on CR construct
CR -> PPVT	0.81^***	.86^***	.92^***	.37^***
CR -> Education	0.69^***	.70^***	.70^***	.29^***
CR -> WAT	0.88^***	.83^***	1.49^***	.62^***

Correlations with other constructs
CR <-> Memory		.51^***	.51^***
CR <-> Speed		−.54^***	−.50^***
CR <-> Exec Function		.84^***	.90^***

	Memory	Speed	Exec Function

Loadings on other constructs
Model C
PPVT		−.17	−.77
Education
WAT		−.14	−.21
Model D
PPVT	.12	−.05	.63^***
Education	.01	.09	.70^***
WAT	.11	.05	.64^***

Note. CFI= Comparative Fit Index; RMSEA= Root Mean Square Error of Approximation; CR = Cognitive Reserve; PPVT= Peabody Picture Vocabulary Test; WAT= Word Accentuation Test.

p <.05.

^**

p <.01.

^***

p <.001. See Table 4 note for a detailed description of what the values in each row and column represent.