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Mean percentage of time spent locomoting as a function of the experimental phase in the medication choice study. Error bars represent the standard error of the mean. The percentage of time spent locomoting was higher during the experimental phases of the paradigm, including the choice phase (during which chimpanzees received a choice between meloxicam and ibuprofen) compared to the baseline phase (prior to the start of the study) (p ≤ 0.05).
