Signal detection is calculated from the hit rates, false alarm rates, and d’.
Sensitivity (d’) is calculated as d’= Z(Hit Rate %)-Z(False Alarm Rate) (Stanislaw et al., 1999).
According to Stone (2008), d’ is “the ratio of the ordinate of the SN (signal plus noise) at the criterion to the ordinate of the random variation of the N (Random variation plus noise) distribution at the criterion.”