Model

Factor

χ²

df

Δχ²

GFI

RMSEA

CFI

TLI

Null model

3777.49

45

Basic model

Three factors：KH; KS; KIP

260.67

32

0.94

0.094

0.94

0.91

Model 1

Two factors：KH; KS+KIP

581.59

34

320.92^**

0.87

0.14

0.88

0.81

Model 2

Two factors：KH; +KS; KIP

769.68

34

509.01^**

0.84

0.16

0.83

0.74

Model 3

Two factors：KH + KIP; KS;

996.02

34

735.35^**

0.80

0.19

0.77

0.66

Model 4

One factor：KH + KS + KIP

1230.52

35

969.85^**

0.77

0.21

0.73

0.59