Journal
JOURNAL OF COMPARATIVE PSYCHOLOGY
Volume 122, Issue 4, Pages 441-444Publisher
AMER PSYCHOLOGICAL ASSOC
DOI: 10.1037/0735-7036.122.4.441
Keywords
cotton-top tamarins; color cues; foraging task; cue reversal; spatial cues
Funding
- University of Wisconsin Hilldale Student-Faculty
- UPSHS [MH029775]
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Animals living in stable home ranges have many potential cues to locate food. Spatial and color cues are important for wild Callitrichids (marmosets and tamarins). Field studies have assigned the highest priority to distal spatial cues for determining the location of food resources with color cues serving as a secondary cue to assess relative ripeness, once a food source is located. We tested two hypotheses with captive cotton-top tamarins: (a) Tamarins will demonstrate higher rates of initial learning when rewarded for attending to spatial cues versus color cues. (b) Tamarins will show higher rates of correct responses when transferred from color cues to spatial cues than from spatial cues to color cues. The results supported both hypotheses. Tamarins rewarded based on spatial location made significantly more correct choices and fewer errors than tamarins rewarded based on color cues during initial learning. Furthermore, tamarins trained on color cues showed significantly increased correct responses and decreased errors when cues were reversed to reward spatial cues. Subsequent reversal to color cues induced a regression in performance. For tamarins spatial cues appear more salient than color cues in a foraging task.
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