Fig. 6

Criterion shift: receiver operating characteristic (ROC) curves comparing showups and 6-person lineups, with decision criterion fixed or allowed to shift + .01, + .025, and + .05, if two or more lineup members’ match values fell above csim. a Fair lineup, SSF = SSP = .6. b Biased lineup, SSF = .5, SSP = .75. SSP Similarity of the innocent Suspect to the PERP, SSF Similarity of the Suspect to the Fillers, PERP perpetrator