Figure 2.

(A) An illustration of the ‘same/different’ perceptual discrimination task. Individuals indicate their confidence that the scenes are the same or different. The two scenes are either identical or have been slightly altered. (B) Receiver operating characteristics for controls and patients with medial temporal lobe damage (left), along with estimates of state and strength-based perception in each group (right). Hippocampal damage reduced strength-based perception, but did not impact state-based perceptual responses (Aly, Ranganath, & Yonelinas, 2013).