Table 2.
Goodness-of-fit indices for the tested models.
| NFP | χ2(df) | χ2G1(df) | χ2G2(df) | CFI | TLI | RMSEA [90% CI] | SRMR | AIC (ΔAIC) | |
|---|---|---|---|---|---|---|---|---|---|
| Model 1 (G1 = A; G2 = A) | 16 | 22.826(12)* | 18.779(6)** | 4.047(6)n.s. | 0.981 | 0.981 | 0.085 [0.026,0.138] | 0.081 | 1318.690(9.68) |
| Model 2 (G1 = B; G2 = A) | 17 | 11.143(11)n.s. | 7.096(5)n.s. | 4.047(6)n.s. | 1.00 | 1.00 | 0.010 [0.000,0.095] | 0.047 | 1309.007(0) |
| Model 3 (G1 = B; G2 = B) | 18 | 10.378(10)n.s. | 7.096(5)n.s. | 3.282(5)n.s. | 0.999 | 0.999 | 0.017 [0.000,0.099] | 0.045 | 1310.242(1.24) |
| NFP | χ2(df) | χ2G1(df) | χ2G2(df) | CFI | TLI | RMSEA [90% CI] | SRMR | Δχ2(Δdf) of M4 vs. M2 | |
| Model 4 | 15 | 13.279(13)n.s. | 7.920(6)n.s. | 5.359(7)n.s. | 1.00 | 1.00 | 0.013 [0.000,0.090] | 0.160 | 2.136(2)n.s. |
G1, intervention group; G2, control group; A, no-change model; B, latent change model; NFP, Number of Free Parameters; df, degrees of freedom; χ2G1, contribution of G1 to the overall chi-square value; χ2G2, contribution of G2 to the overall chi-square value; CFI, Comparative Fit Index; TLI, Tucker-Lewis Index; RMSEA, Root Mean Square Error of Approximation; CI, confidence intervals; SRMR, Standardized Root Mean Square Residual; AIC, Akaike's Information Criterion.
ΔAIC = Difference in AIC between the best fitting model (i.e., Model 2; highlighted in bold) and each model.
Model 4 = Model 2 with mean and variance of intercepts constrained to be equal across groups.
The full Mplus syntaxes for these models were reported in Appendices.
p > 0.05;
p < 0.05;
p < 0.01.