As shown in Table 7, moderation on the cross a, c, and e paths could be dropped; therefore the extended univariate model was used to further test for moderation. Moderation could only be retained on the e path in the extended univariate model. Therefore genetic and shared environmental influences did not change significantly across levels of parental knowledge. Unique environmental influences were greater at lower scores on the parental knowledge variable (riskier environment) and reduced at higher scores on the parental knowledge variable (See Supplemental Figure).
