Second, potential evidence of publication bias was found for heritability, environmentality, corrected environmentality, and genetic stability in that a symmetrical funnel shape was not found for low precision studies. To evaluate the influence that such possible publication bias had on the results, we deleted any effect size that had standard errors greater than .075 which corresponded to where the asymmetry became apparent. Then, we computed the parameters for the exponential model based on this limited dataset. The lifespan trends from the resulting model were essentially the same as those reported in Table 4. Therefore, although there may be some publication bias for low precision studies, the meta-analytic estimates reported in this manuscript can be considered robust to this bias.
