Figure 12.

IT model for m = 2 methods. This model includes multiple indicators Y_imt, indicator-specific trait factors T_im, and state residual factors SR_mt separately for each method. This accounts for the fact that occasion-specific effects may not generalize perfectly across different methods. All trait factors can be correlated. Occasion-specific factors pertaining to different methods at the same measurement occasion can also be correlated, indicating the generalizability of occasion-specific effects across different methods.