Consistent with the results of analyses of the complete dataset, results of analyses of only self-report data indicate that phenotypic, genetic, and environmental stabilities increase significantly with age, particularly up until about age 30 years (Figure S2). In fact, these rises in stability are somewhat more pronounced for the analyses of exclusively self-report data than for the analyses of the complete dataset, indicating that they are not artifacts of blending information from self- and informant- report formats. Age-related trends for heritability and environmentality derived from analyses of only self-only report data (Figure S1) are weaker than for those derived from analyses of the complete dataset. For analyses of only self-report data, heritability does appear to decline (and environmentality increase) slightly early in life, but this trend is not statistically significant. The predominant pattern is for constant magnitudes of genetic and environmental influences on personality across the lifespan. Corrected environmentality did significantly increase with age, but this increase was modest and plateaued quickly. Of course, if the most dramatic changes in heritability and environmentality primarily occur in the first decade of
