Humans’ (Homo sapiens), capuchin monkeys’ (Sapajus [Cebus] apella), and rhesus macaques’ (Macaca mulatta) size judgments shift when stimuli change in frequency.
Sierra M. V. Simmons,
Sarah F. Brosnan
Abstract:When making decisions, humans often strive to uphold objective, absolute standards, such as about what is small versus large, blue versus purple, or unfair versus fair, suggesting that our judgments should not be swayed by extraneous factors such as the sequence or frequency of events to be judged. Yet in previous research, when some items (e.g., threatening faces) became less frequent, humans responded by expanding their concept (of "threatening") to include more ambiguous stimuli. We assessed the origins of … Show more
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