Fig. 7
From: Visual search errors are persistent in a laboratory analog of the incidental finding problem
a (top). Reaction times as a function of visual set size for the 1st (specific) response. b (bottom). Reaction times as a function of visual set size for the 2nd (categorical) response. Each line corresponds to a type of trial. There are two possible true-negative responses for response 1 and response 2: a trial containing no targets at all, and a trial containing a target of the other type