Across both studies, participants appeared to exhibit greater criterion shifts when manipulated to become more strict versus lax (see Figs. 3a and 4). Different shifts in criteria across groups are consistent with Han and Dobbins’s (2008) study. However, reducing the number of trials in one of their subsequent experiments eliminated group differences in criteria (Han & Dobbins, 2008, Exp.3). Although this was not a focus of the present study, increasing task difficulty might lead to increased criterion flexibility over time.