Table 2.
Fit Indices of all Models, and Δχ2 Test Results of Relevant Model Comparisons
| Variable | Model | χ2 (df) | CFI | RMSEA (90% CI) | SRMR | Δχ2 (df) to previous |
|---|---|---|---|---|---|---|
| Overall | (1) Full Accelerated LGCM | 286.53 (60), p < .001 | .858 | .076 (.068, .085) | .113 | N/A |
| (2) Multi-Group LGCM | 98.20 (48), p < .001 | .969 | .040 (.029, .051) | .048 | 188.33 (12), p < .01 | |
| (3) Sex Added to (2) | 121.55 (60), p < .001 | .968 | .040 (.030, .050) | .044 | N/A | |
| Social Networking | (1) Full Accelerated LGCM | Does not converge* | ||||
| (2) Multi-Group LGCM | 79.30 (48), p = .003 | .968 | .032 (.019, .044) | .045 | N/A | |
| (3) Sex Added to (2) | 105.36 (60), p < .001 | .964 | .034 (.023, .045) | .042 | N/A | |
| Gaming | (1) Full Accelerated LGCM | 160.40 (60), p < .001 | .887 | .051 (.041, .060) | .098 | N/A |
| (2) Multi-Group LGCM | 81.61 (48), p < .001 | .962 | .033 (.020, .045) | .053 | 78.79 (12), p < .01 | |
| (3) Sex Added to (2) | 98.44 (60), p = .001 | .967 | .031 (.020, .042) | .049 | N/A | |
| Web use | (1) Full Accelerated LGCM | 151.08 (60), p < .001 | .883 | .048 (.039, .058) | .106 | N/A |
| (2) Multi-Group LGCM | 74.51 (48), p = .008 | .966 | .029 (.015, .042) | .052 | 76.57 (12), p < .01 | |
| (3) Sex Added to (2) | 94.29 (60), p = .003 | .965 | .030 (.017, .041) | .048 | N/A | |
| Passive | (1) Full Accelerated LGCM | 185.52 (60), p < .001 | .872 | .057 (.048, .066) | .092 | N/A |
| (2) Multi-Group LGCM | 75.48 (48), p = .007 | .972 | .030 (.016, .042) | .045 | 110.04 (12), p < .01 | |
| (3) Sex Added to (2) | 93.23 (60), p = .004 | .972 | .029 (.017, .040) | .041 | N/A |
*Covariance matrix (PSI) in one or more groups is not positive definite
Good model fit = CFI values above .95; RMSEA scores of .06 or less; SRMR <.05