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. 2020 Jun 26;6(26):eaaz1002. doi: 10.1126/sciadv.aaz1002

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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. 1 — (A) Monkeys, children, U.S. adults, and Tsimane’ adults complete the sequence generation task. Subjects were required to touch the images in a center-embedded order. (B) A sample training trial is shown. Subjects were trained to order two training lists in which the pictures had to be touched in a specific center-embedded order (C) and were tested on a third transfer list that was rewarded regardless of the sequence generated (D). Photo credit: S.F., Harvard University.