Table 2.
Sample sizes, model χ2, and latent growth factor parameters in boys and girls across two subsamples, each of one twin randomly selected from a pair, in TEDS.
| Boys 1 | Girls 1 | Boys 2 | Girls 2 | |
|---|---|---|---|---|
| N | 3549 | 3891 | 3536 | 3877 |
| χ2(36) | 361.27 | 298.94 | 402.45 | 285.94 |
| Intercept | 97.17 | 103.13 | 97.33 | 102.93 |
| SEI | 0.27 | 0.26 | 0.27 | 0.25 |
| VarianceI | 163.52 | 162.21 | 164.25 | 159.42 |
| CI (95%)I | 96.64 to 97.70 | 102.63 to 103.63 | 96.80 to 97.86 | 102.43 to 103.42 |
| Slope | 0.83 | − 0.79 | 0.80 | − 0.80 |
| SES | 0.09 | 0.08 | 0.09 | 0.08 |
| VarianceS | 7.44 | 7.55 | 8.06 | 7.25 |
| CI (95%)S | 0.66 to 0.99 | − 0.94 to − 0.64 | 0.64 to 0.97 | − 0.95 to − 0.64 |
| Quadratic | − 0.06 | 0.03 | − 0.05 | 0.03 |
| SEQ | 0.01 | 0.01 | 0.01 | 0.01 |
| VarianceQ | 0.02 | 0.02 | 0.03 | 0.02 |
| CI (95%)Q | − 0.07 to − 0.04 | 0.02 to 0.05 | − 0.06 to − 0.04 | 0.02 to 0.04 |
Note. Fit indices for the multi-group model in sample 1 were: CFI = .947; TLI .947; and RMSEA = .047 (CI 95% .044 to .050). Fit indices for the multi-group model in sample 2 were: CFI = .944; TLI = .944; and RMSEA = .048 (CI 95% .045 to .051). SE refers to Standard Error; CI 95% refers to Confidence Interval of 95%; the subscripts I, S, and Q refer to intercept, slope and quadratic term respectively.