Table 3.

Factor loadings of P(r)VLT indices using varimax rotation: Eigenvalues and percentage of variance^a

	Factor loading
	1	2	3	4
	Delay	Free	Intrusions	Recognition	Communality
Long Delay Cued Recall	.86	.19	−.09	.03	.74
Long Delay Free Recall	.85	.12	−.14	−.05	.70
Short Delay Free Recall	.85	.06	−.05	−.03	.77
Short Delay Cued Recall	.81	.22	−.05	.05	.78
Interference Free Recall	.10	.91	−.16	.01	.71
Total 1–5 Free Recall	.45	.73	.13	−.03	.73
Free Intrusions Total	.02	−.16	.82	−.16	.86
Cued Intrusions Total	−.22	.10	.77	.24	.77
Recognition Hits	.31	.06	−.16	.81	.81
Recognition False Positives	−.37	.08	.25	.77	.76
Eigenvalues	3.86	1.44	1.23	1.09
% of variance	38.62	14.43	12.26	10.93

^aPrincipal component analysis using varimax rotation (five iterations) with exclusion of eigenvalues < 1.0 assessed the underlying structure of the P(r)VLT indices in the dementia sample. These factors were converted to composite z-scores based on the ND sample. The four composites have adequate normative properties for analysis purposes (i.e., Delay Free Recall skewness = .99, kurtosis = .91; Immediate Free Recall skewness = −.11, kurtosis = −.17; Intrusions skewness = −1.11, kurtosis = 2.08; Recognition skewness = .27, kurtosis = −.19).