Having completed this process, we compiled each parameter depicted in Figure 2 with the associated standard error and calculated the phenotypic stability and the genetic and environmental contribution to stability and associated standard errors. We encountered a few instances where the correlated factors model applied to summary data converged to an out-of-bounds estimate. Correlations are bounded by −1 and +1, but some estimates of genetic stability and corrected environmental stability exceeded the upper bound. This result occurred for a small number of effect sizes. For genetic stability, nine estimates were greater than 1 (mean estimate = 1.09, range = 1.01–1.28). For corrected environmental stability, 31 estimates were greater than 1 (mean estimate = 1.39, range = 1.02–2.61). These estimates tended to be imprecise (mean SE = .20). As these estimates tended to carry comparatively small weight in the analyses, we chose to leave them in the dataset as estimated. The patterns of results are unchanged if these estimates are removed or censored to the closest reasonable estimate.
