. Author manuscript; available in PMC: 2011 Sep 1.

Published in final edited form as: Assessment. 2010 May 19;18(1):39–49. doi: 10.1177/1073191110368482

Table 4.

NEO-FFI Internal Consistency Across Subgroups Defined by Demographic Variables, Depression and Recruitment

Patient Subgroup	Internal Consistency (Cronbach’s Alpha)

	N	E	O	A	C

Gender
Men (n’s = 98)	.85	.76	.71	.73	.82
Women (n’s = 321)	.88	.81	.71	.73	.84
Education
≤ HS Education (n = 134)	.86	.73^**	.51^***	.73	.84
> HS Education (n = 283)	.88	.82^**	.74^***	.73	.84
Age
< 47 years old (n = 190)	.90^***	.82	.61^***	.75	.84
≥ 47 years old (n = 224^a)	.84^***	.78	.76^***	.71	.83
Depression
BDI Fast Screen < 3 (n = 208)	.80	.79	.71	.76	.83
BDI Fast Screen ≥ 3 (n = 187)	.81	.74	.71	.70	.82
Recruitment Method
Research (n = 93)	.90	.83	.70	.74	.87
Routine Clinical (n = 198)	.86	.78	.71	.73	.81
Clinical Referral (n = 117)	.85	.79	.72	.75	.85

Notes. N = Neuroticism, E = Extraversion, O = Openness, A = Agreeableness, C = Conscientiousness domains of NEO-FFI. Age groups based on above/below mean sample age of 47. Cognitive impairment determined by z-score of −1.5 or greater on 2 or more tests.

^**

= difference between values for a given patient characteristic significant at p < .01 and

^***

= difference between values for a given patient characteristic significant at p < .001 by Feldt W test (1987).