Risky business: rhesus monkeys exhibit persistent preferences for risky options.

Examining only the experiments with risk preferences, i.e., Experiments 1–6, neither monkey exhibited a significant change overall (linear regression, Monkey P: R 2 = 0.63, p = 0.059; Monkey T: R 2 = 0.13, p = 0.833), although Monkey P was trending toward significance ( p = 0.059), which was due to a significant decrease for Configuration 1 ( R 2 = 0.8, p < 0.05) but not Configuration 2 ( R 2 = 0.28, p = 0.28).

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