Table 7. BFI-10 item retest coefficients, and alpha coefficients for test and retest sessions.
| Study 1a | Study 2b | Study 2c | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| T1 | T2 | Retest coefficients | T1 | T2 | Retest coefficients | T1 | T2 | Retest coefficients | ||||
| alpha (2-item correlation) | alpha (2-item correlation) | item 1 (item 2) | overall | alpha (2-item correlation) | alpha (2-item correlation) | item 1 (item 2) | overall | alpha (2-item correlation) | alpha (2-item correlation) | item 1 (item 2) | overall | |
| E | .788 (.651) | .687 (.523) | .788 (.647) | .803 | .722 (.572) | .795 (.661) | .783 (.763) | .823 | .762 (.630) | .683 (.525) | .799 (.774) | .873 |
| A | .122 (.066) | .243 (.142) | .386 (.504) | .515 | .439 (.283) | .498 (.334) | .760 (.771) | .811 | .458 (.299) | .189 (.104) | .588 (.684) | .731 |
| C | .356 (.223) | .272 (.162) | .703 (.554) | .668 | .138 (.075) | -.090 (-.043) | .652 (.506) | .645 | .329 (.199) | .293 (.181) | .710 (.596) | .706 |
| N | .626 (.457) | .639 (.470) | .568 (.456) | .610 | .605 (.433) | .716 (.559) | .579 (.716) | .749 | .532 (.363) | .494 (.330) | .710 (.755) | .837 |
| O | .329 (.198) | .393 (.246) | .599 (.530) | .698 | .291 (.173) | .324 (.196) | .857 (.645) | .821 | .551 (.381) | .499 (.336) | .826 (.735) | .839 |
E = extraversion; A = agreeableness; C = conscientiousness; N = neuroticism; O = openness. T1 = test 1; T2 = test 2. Study 1a, n = 90/91; Study 2b, n = 78/79; Study 2c, n = 91.