Phenotypic correlations of novel and target P3 and standard P2 with 4 measures of alcohol use using twins as individuals are presented in Table 4. All 3 novel-sound P3 (novel P3) amplitude values correlated negatively and the P2 latency positively (with p < 0.001) with lifetime report of “Maximum number of drinks consumed in a 24-hour period,” MAX-D24. Target P3 latencies correlated negatively (p < 0.05) with each of the 3 other self-reports of alcohol use including RAPI from the questionnaire at age 18½.
