Fig. 5
From: ROC curve analyses of eyewitness identification decisions: An analysis of the recent debate
Simulated receiver operating characteristic curves using three possible decision rules in a six-person simultaneous lineup with true d′ = 1.5. Absolute rule: The strongest item above criterion is selected. Relative rule: The strongest above-criterion item is selected if it exceeds the next best item by a minimum amount (here, 0.15 d′ units); otherwise, the lineup is rejected. Guess if small rule: Same as the relative rule, except that the witness is assumed to guess if the difference between the two strongest items is too small (<0.15 d′ units)