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. 2020 Jul 17;6(29):eaaz0484. doi: 10.1126/sciadv.aaz0484

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Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

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Fig. 2 — (A) Examples of a TI set with the six adjacent training pairs and the six critical internal test pairs. (B) Hippocampal damage did not impair choice of the higher ranked item on critical internal test trials; main effect of group: F_1,8 = 0.73, P = 0.795; main effect of TI set: F_2,16 = 0.635, P = 0.543; group × TI set: F_2,16 = 0.295, P = 0.756. (C) Hippocampal damage did not affect errors to criterion on either the pre- or postlesion TI sets; main effect of group: F_1,8 = 0.130, P = 0.728; group × TI set: F_1,8 = 0.531, P = 0.487. (D) Hippocampal damage did not alter how monkeys solved TI tests, as measured by the SDE (accuracy: main effect of group: F_1,8 = 0.049, P = 0.830; main effect of SDE: F_4,32 = 56.66, P < 0.001; group × TI set: F_2,16 = 3.43, P = 0.058; SDE × TI set: F_8,64 = 0.99, P = 0.446; SDE × group × TI set: F_8,64 = 0.63, P = 0.749; response latency: main effect of group: F_1,8 = 1.254, P = 0.295; main effect of SDE: F_4,32 = 20.07, P < 0.001; group × TI set: F_2,16 = 2.75, P = 0.094; SDE × TI set: F_8,64 = 1.18, P = 0.346; SDE × group × TI set: F_8,64 = 0.84, P = 0.574). Error bars represent SEM. Stimuli images from Flickr under a Creative Commons CC BY 2.0 Generic License.