Fig. 4

A schematic diagram of the Spot-the-Difference task used in Experiment 2. We provide an example of each of the trial types on the left: either two intact fingerprints were displayed or two scrambled prints, and the target change had been made to either a ‘more useful’ feature (a) or a ‘less useful’ feature (b). When generating the scrambled fingerprints, we kept the location of the target change identical to those in the intact prints. The correct location of the change in each example is displayed on the right