Fig. 2.

Accuracy at identifying the unique object for controls (CON, n = 12), patients with hippocampal lesions (H, n = 5), and a patient with large medial temporal lobe lesions (MTL, n = 1) across six levels of difficulty (eight trials per level). Difficulty (Materials and Methods) was manipulated by varying the number of objects in each display (five or seven), the number of appendages on each object (two or four), the number of body colors in each display (two or one), and the differences among the appendages (relatively salient or more subtle). For difficulty levels 1 and 2, chance = 20.0%; for difficulty levels 3–6, chance = 14.3%. Brackets show SEM.