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. Author manuscript; available in PMC: 2020 Jun 17.
Published in final edited form as: Behav Ecol Sociobiol. 2016 Dec 20;71(1):26. doi: 10.1007/s00265-016-2234-8

Fig. 1.

Fig. 1

Experiment 1b: 95% confidence interval for mean selection order of containers in a 1-2-3-4 rank ordering task on indoor testing tray, peanut reward, for each individual chimpanzee. V = variable, S = stable. Number denotes mean quantity