Table S4 in the supporting information lists the results for P3-specific candidate SNPs. Two SNPs out of 176 were nominally significant for P3 amplitude (p < .05), while one SNP—a different one—yielded a p value less than .05 for the genetic factor score. None of the p values was close to the Bonferroni-corrected threshold of 2.73 × 10−4. Table S5 gives results for SNPs in our endophenotype-general candidate SNP set of 1,180. None of the observed p values approached the Bonferroni-corrected threshold of 4.24 × 10−5; the smallest, for P3 amplitude, was 5.38 × 10−4.
