Underlying factor model

X^{2}(p)

df

CMIN/DF

GFI

RMR

RMSEA

CFI

NFI

Standardized loadings


Full form (KPAID)
         
Onefactor model^{a}

634.567 (p < 0.001)

169

3.755

0.864

0.074

0.079

0.903

0.873

0.290.83

Twofactor model^{b}

615.042 (p < 0.001)

168

3.661

0.907

0.074

0.078

0.907

0.877

0.310.84

Twofactor model^{c}

580.633 (p < 0.001)

168

3.456

0.876

0.072

0.075

0.914

0.884

0.310.84

Threefactor model^{d}

567.558 (p < 0.001)

166

3.419

0.878

0.072

0.074

0.917

0.887

0.290.83

Fourfactor model^{e}

561.753 (p < 0.001)

164

3.425

0.880

0.072

0.074

0.918

0.888

0.370.88

Short form (KPAID5)
         
Onefactor model^{f}

11.536 (p = 0.021)

4

2.884

0.990

0.039

0.066

0.993

0.989

0.650.84

 df, Degrees of freedom; CMIN/DF, Ratio of chisquare value to the degrees of freedom; GFI, Goodnessoffit index; RMR, Rootmeansquare residual; RMSEA, Rootmeansquare error of approximation; CFI, Comparativefit index; NFI, Normed fit index.
 ^{a}After modification with the covariance of error terms between items 1 and 2 [modification index (MI) = 52.59, ∆X^{2}(1) = 55.989, p < 0.01], based on the factor model of Welch et al. [8].
 ^{b}After modification with the covariance of error terms between items 1 and 2 [MI = 51.79, ∆X^{2}(1) = 54.691, p < 0.01], based on the factor model of Miller et al. [13].
 ^{c}After modification with the covariance of error terms between items 1 and 2 [MI = 55.56, ∆X^{2}(1) = 55.718, p < 0.01], based on the factor model of Huis In ‘t Veld et al. [15].
 ^{d}After modification with the covariance of error terms between items 1 and 2 [MI = 53.24, ∆X^{2}(1) = 56.501, p < 0.01], based on the factor model of Papathanasiou et al. [12].
 ^{e}Based on the factor model of Snoek et al. [9].
 ^{f}After modification with the covariance of error terms between items 3 and 6 [MI = 31.50, ∆X^{2}(1) = 42.026, p < 0.01], based on the factor model by McGuire et al. [21].