Arithmetic-Like Reasoning in Wild Vervet Monkeys: A Demonstration of Cost-Benefit Calculation in Foraging

<table>Correct response rates over sessions for successive visibility. The correct response rates were calculated as the percentage of “attempt made” trials when the remainder was 2 and 1, and “attempt not made” trials when the remainder was 0, over the total 7 trials for each session.</table>

International Journal of Zoology

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Figure 9

Figure 9: Arithmetic-Like Reasoning in Wild Vervet Monkeys: A Demonstration of Cost-Benefit Calculation in Foraging 