Table 4.
Model Comparisons for Healthy and Chronically Ill Student Groups.
| Model | X 2 | df | p |
X2 difference** |
df difference |
Significance (difference) |
RMSEA | CFI | SRMR |
|---|---|---|---|---|---|---|---|---|---|
|
| |||||||||
| 1. Same Form | 301.71 | 98 | <.001 | – | – | – | .052 | .974 | .028 |
| 2. Same Loadings | 302.07 | 106 | <.001 | .36(1v2) | 8 | ns | .049 | .975 | .032 |
| 3. Same Loadings and Err Variances | 407.17 | 133 | <.001 | 105.10(2v3) | 27 | Sig. | .052 | .965 | .051 |
| 4. Same Loadings and Intercepts | 341.29 | 119 | <.001 | 39.22(2v4) | 13 | Sig. | .049 | .972 | .039 |
Note: Target parameters for good model fit are RMSEA < .05, CFI > .95, and SRMR < .05; RMSEA = root mean square error of approximation, CFI = comparative fit index, SRMR = standardized root mean-squared residual. The goal for X2 is non-significance; however, large sample size may lead to a significant X2 result.
** Model elements are constrained to compare between the groups, 1 v. 2 = comparison between fully unconstrained model and model with constrained factor loadings, 2 v. 3 = comparison between constrained loadings only and constrained loadings plus error variances, 2. v. 4 = comparison between constrained loadings only and constrained loadings and intercepts.