Table 1.

Summary of model fit. The number of parameters excludes those which fixed to zero during the model fitting process

aModel	Number of parameters	bAIC	cBIC	Log likelihood
RN-L	18	− 8076.89	− 7947.08	4056.445
RN-NL	25	− 8215.64	− 8035.35	4132.818
RR-2	44	− 8565.06	− 8247.76	4326.532
FA-2	58	− 9601.79	− 9183.52	4858.896

^aRN-L linear reaction norm; RN-NL Nonlinear reaction norm; RR-2 Reduced-rank factor-analytic model with two common factors and zero specific genetic effects; FA-2 Factor-analytic model with two common factors and specific genetic effects

^bAkaike information criterion

^cBayesian information criterion