Table 4 Fit indices of single factor model for studies separately and for the strict and partial factorial invariance model for all studies together

Study A

156.6

54

<0.0001

2.9

0.080

0.966

0.958

Study B

115.6

54

<0.0001

2.1

0.082

0.966

0.958

Study C

83.0

54

0.0068

1.5

0.067

0.971

0.964

Study D

88.4

54

0.0022

1.6

0.064

0.986

0.983

Study E

87.6

54

0.0026

1.6

0.052

0.993

0.991

Studies A-E strict factorial invariance model

639.3

406

<0.0001

1.6

0.054

0.983

0.986

Studies A-E partial factorial invariance model

645.7

358

<0.0001

1.8

0.064

0.979

0.981