Differences in report format are heavily clustered at certain ages (i.e., informant-report predominates at early ages, and self-report in adulthood). Although our above moderation analysis indicated that effect sizes did not substantially differ by report format, we were interested in whether the age trends identified earlier would hold when only self-report effect sizes were used. This approach avoids potential differences in effect sizes on the basis of report format being mistaken for age trends in effect sizes, at the cost of reducing the meta analytic sample size and removing information derived from infant and early childhood samples. Because the exponential and spline models applied in our main analyses largely agreed with one another, we focused this sensitivity analysis on the exponential model, which we fit only to effect sizes derived from self-report data. Results are tabulated in Table S1 and illustrated in Figures S1–S3 of the online supplement. Note that age 9 years is the youngest self-report effect size, and we do not extrapolate the expected trend line to younger ages.
