As shown in Table 2b, all four density measures were significantly associated with P3 amplitude. That is, increases in density scores were associated with lower P3 amplitude. On contrary, among dichotomous measures, except FHFirst–AUDDx, that failed to reach significance (following Bonferroni adjusted alpha), the rest were significantly associated, albeit the magnitude of their associations was modest. Further, FHDrPSND–AUDMaxSxCnt (b=2.52) and FHFather–AUDDx (b=1.03) presented the most robust associations among density and dichotomous measures respectively. Overall, density measures presented consistently greater magnitude of associations with P3 amplitude evidencing greater reliability over dichotomous measures.
