. Author manuscript; available in PMC: 2008 Feb 19.

Published in final edited form as: J Pers Soc Psychol. 2006 Oct;91(4):763–779. doi: 10.1037/0022-3514.91.4.763

Table 3.

Internal Consistency (Coefficient Alpha) and Test-Retest Stability of Each of the Five BFI Scales (N = 799)


BFI Scale	No. items	Alpha-1	Alpha-2	Retest r	Corrected r

Extraversion	8	.84	.84	.79	.94

Agreeableness	9	.78	.80	.70	.87

Conscientiousness	9	.80	.81	.70	.87

Neuroticism	8	.82	.85	.71	.85

Openness	10	.79	.83	.79	.98

Mean		.81	.83	.74	.90

Note. The two values of Coefficient Alpha are based on the first (Alpha-1) and second (Alpha-2) administrations of the BFI items. The test-retest correlations are corrected for the unreliabilities at each of the two administrations. The average length of the test-retest interval was approximately 1,000 days (2.8 years).