Self-control in rhesus macaques (Macaca mulatta): controlling for differential stimulus exposure |
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Authors: | Szalda-Petree Allen D Craft Baine B Martin Lori M Deditius-Island Heide K |
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Institution: | Department of Psychology, Skaggs Building, Room 143, The University of Montana-Missoula, Missoula, MT 59812-MPSI01, USA. allen.szalda-petree@umontana.edu |
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Abstract: | Previous research on self-control using macaques (Macaca fascicularis) showed these animals have a strong bias for a delayed, larger reinforcer (Self-control) over an immediate, smaller reinforcer (Impulsive). Typical studies of self-control have used a discrete trials methodology with a secondary discriminative stimulus during the delay periods. This results in a greater exposure to the stimulus representing the self-controlled option and may account for some of the early exclusive preference for self-control observed. The present experiment examined self-control bias in three rhesus macaques (Macaca mulatta) while controlling for differential durations of stimulus exposure. Subjects were presented stimuli via a computer monitor and made choices by touching the stimulus at which point both stimuli were removed for the delay periods. All three subjects displayed a nearly exclusive bias for the delayed, larger reinforcer self-control). These results are consistent with previous studies, despite the variations in methodology and species. |
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