Table 3. Cross-sample test model fitness indicators.
| Model no. | Nest | Parameter constrained | Sample | χ 2 | df | χ 2 /df | Δχ 2 /Δdf | CFI | ΔCFI | TLI | ΔTLI | SRMR | RMSEA (90% CI) | AIC | BIC/adjusted BIC |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | None | 559.154 | 141 | 3.97 | 0.968 | 0.956 | 0.053 | 0.065(0.059 0.071) | 102,047.98 | 102,777.83/102,367.983 | |||||
| S | 104.826 | ||||||||||||||
| R | 121.993 | ||||||||||||||
| STU | 332.336 | ||||||||||||||
| 2 | 1 | FL | 639.86 | 161 | 3.97 | 4.04*** | 0.964 | 0.004 | 0.955 | 0.001 | 0.062 | 0.065(0.060 0.070) | 102,088.685 | 102,705.381/102,359.076 | |
| S | 138.416 | ||||||||||||||
| R | 155.251 | ||||||||||||||
| STU | 346.194 | ||||||||||||||
| 3 | 1, 2 | FL, INT | 1,060.69 | 181 | 5.86 | 21.04*** | 0.933 | 0.031 | 0.927 | 0.028 | 0.073 | 0.083(0.078 0.088) | 102,469.515 | 102,973.055/102,690.293 | |
| S | 285.153 | ||||||||||||||
| R | 353.651 | ||||||||||||||
| STU | 421.886 | ||||||||||||||
| 4 | 1, 2, 3 | FL, INT, UNQ. | 1,252.441 | 205 | 6.11 | 7.99*** | 0.921 | 0.012 | 0.923 | 0.004 | 0.078 | 0.085(0.081 0.090) | 102,613.267 | 102,981.021/102,774.509 | |
| S | 354.593 | ||||||||||||||
| R | 387.961 | ||||||||||||||
| STU | 509.888 | ||||||||||||||
| 5 | 1, 2, 3 | FL, INT, FVCV | 1,139.831 | 187 | 6.10 | 13.19*** | 0.928 | 0.005 | 0.924 | 0.003 | 0.097 | 0.085(0.080 0.090) | 102,536.657 | 103,006.250\102,742.550 | |
| S | 329.744 | ||||||||||||||
| R | 375.36 | ||||||||||||||
| STU | 434.726 | ||||||||||||||
| 6 | 1, 2, 3, 5 | FL, UNQ, FVCV, FMn | 1,558.336 | 191 | 8.16 | 104.63*** | 0.896 | 0.032 | 0.893 | 0.031 | 0.125 | 0.101(0.096 0.105) | 102,947.161 | 103,394.124/103,143.133 | |
| S | 598.898 | ||||||||||||||
| R | 449.926 | ||||||||||||||
| STU | 509.512 | ||||||||||||||
| 7 | 1, 2 | FL, FVCV | 719.409 | 167 | 4.31 | 13.26*** | 0.958 | 0.006 | 0.95 | 0.005 | 0.088 | 0.068(0.063 0.074) | 102,156.234 | 102,738.983/102,411.741 | |
| S | 182.48 | ||||||||||||||
| R | 175.926 | ||||||||||||||
| STU | 361.002 | ||||||||||||||
| 8 | 1, 2, 7 | FL, FVCV, FMn | 959.161 | 171 | 5.61 | 59.94*** | 0.94 | 0.018 | 0.931 | 0.019 | 0.097 | 0.081(0.076 0.086) | 102,387.987 | 102,948.104/102,633.570 | |
| S | 331.201 | ||||||||||||||
| R | 243.126 | ||||||||||||||
| STU | 384.834 |
Abbreviations: Nest, the current model nested in the previous model; Parameter(s) constrained: FL, factor loadings constrained to be equal across samples; FMn, factor mean; FVCV, factors‘ variance and covariance; INT, item intercepts; UNQ, uniqueness (error variance); Samples: S, schizophrenia patients; R, first-degree relatives; STU, college students. Goodness-of-fit indicators: CFI, comparative fit index; TLI, Tucker-Lewis index; SRMR, the Standardized Root Mean Square Residual; RMSEA, root mean square error of approximation; AIC, Akaike information criterion; BIC, Bayesian information criterion. ***=P<0.001.