Abstract # 51:

Scheduled for Saturday, August 26, 2017 06:00 PM-08:00 PM: (National Ballroom AB) Poster Presentation


TUFTED CAPUCHIN (CEBUS [SAPAJUS] APELLA) RISK PREFERENCES

J. Leinwand1, G. DeAngelo2 and S. F. Brosnan1
1Georgia State University, Department of Psychology, Atlanta, GA 30302-5010, USA, 2West Virginia University
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     Although it is well known that risk impacts decision-making, less work has looked at the role of context. For example, people gamble more in social situations, but do their preferences change when another individual may win the outcome that they lose? We hypothesized that individuals would prefer options with relatively equal payoffs when another individual received the ‘lost’ option. Thirteen capuchin monkeys learned the value of 6 equally sized but distinctly colored and patterned tokens, each representing a different reward size (1-6 cheerios, respectively). Subjects were then trained to select a high value token pair over a low value token pair (e.g. 5/6 over 1/2). In tests, subjects chose between pairs of tokens were placed on either side of a lazy Susan. The experimenter spun the lazy Susan, stopping with a predetermined token in front of the subject, who exchanged it for its associated reward. In the solo condition, subjects were alone and the other token was discarded; in the paired condition, subjects had a partner who received the second token (and associated reward). Subjects completed 5 sessions of 16 trials of risk neutral, risky, and prospect and inequity comparisons. Preliminary results indicate an aversion to risky options in prospect conditions (probit regressions: B=-1.08, z=-11.49; B=-1.19, z=-30.72; B=-1.01, z=-4.88; ps<.001), and that the presence of a partner may also influence the monkeys' preferences.