Table 3

Fit Statistics for the Four-Factor and Two-Factor Models (n = 35,928)

χ²

df

χ²/df

NNFI

CFI

SRMR

AIC

Four factor model

14 items

10346

71

145.72

0.93

0.94

0.140

10414.00

Two factor model

13 item, no cross-load

9950

64

155.47

0.93

0.94

0.150

10003.89

13 items, item 10 cross-loaded

8749

63

138.86

0.94

0.95

0.120

8803.67

12 items, no cross-load, item 2 dropped for low reliability

8351

53

157.57

0.94

0.95

0.130

8401.41

12 items, item 10 cross-loaded, item 2 dropped for low reliability

7057

52

135.71

0.95

0.96

0.110

7109.47

Note: NNFI: Non-Normed Fit Index; CFI: Comparative Fit Index; SRMR: Standardized RMR; AIC: Akaike's Information Criterion.

All models used correlated factors.

Helfrich et al. Implementation Science 2007 2:13   doi:10.1186/1748-5908-2-13