Relevant to Hypothesis 1, the data in Tables 2 and 3 use Pearson Product Moment correlations to compare SRE-5 and SRE-T values across first degree relatives. Within generations, Table 2 indicates that brother-brother and sister-sister pairs correlated at between .35 and .55 for SRE-5 and SRE-T, but SREs for unrelated offspring correlated about zero. These same-sex sibling correlations indicate a possible heritabiliy of 53% for SRE-5 and 39.5% for SRE-T. Across generations, Table 3 demonstrates that father-sons SRE-T values correlated significantly, with nonsignificant differences for SRE-5 correlations across generations. Mother-daughter SRE-5 and SRE-T scores were positive in sign but correlations were not significant. Neither parent’s SRE values correlated significantly with SRE scores for opposite sex offspring. Note that cross-generation SRE correlations were mostly close to zero for unrelated parent-offspring pairs, and none were significant.
