Supporting Hypothesis 1, both SRE-5 and SRE-T scores correlated positively and significantly across first-degree relatives. This was most robust within generations, with positive and significant but less consistent relationships across generations. This is one of the first evaluations of this question for SRE-T (see also Lai et al., submitted) and the SRE-5 results are consistent with several prior reports from the SDPS, COGA, and ALSPAC (Schuckit et al., 2001; 2005; 2008).
