Fig. 2

The effect of task characteristics on the shapes of ROC curves. a The set of ROC curves for simultaneous lineups of sizes 1 (show up) to 6 as indicated on the figure. Each curve is associated with the same underlying d_t = 1. b The set of ROC curves for simultaneous and sequential lineups of size 6 and d_t = 1. The dashed line is the ROC curve for a simultaneous lineup, identical to curve 6 in panel a. The thin solid lines are the ROC curves for a sequential lineup associated with different minimum criteria to choose, ranging from conservative (2) to lenient (−3). The thick solid line is the ROC curve for a sequential lineup in which response bias is manipulated between participants and ranges from most conservative to most lenient