Chunk #18 — RESULTS — Model fitting — Model 5: Bifactor model with externalizing general factor and specific behavioural disinhibition and substance use factors (Bifactor BD-SUB)
Finally, we fit the BD-SUB bifactor model, in which all phenotypes loaded on a general externalizing factor and residual variation among the phenotypes was captured by behavioural disinhibition and substance use specific factors. This model fit the data well based on fit statistics, but several indicators had negative residual variances or nonsignificant or negative loadings on the general and specific factors, likely reflecting overfitting. In addition, the median standardized factors loadings of the general and specific factors were low, and the SDs were high. H was high for most factors, although this is strongly influenced by the loadings greater than 1.0. ω was below the threshold of good reliability for the general factor and substance use specific factor (0.55 and 0.49, respectively).
