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Using a Touchscreen Paradigm to Evaluate Food Preferences and Response to Novel Photographic Stimuli of Food in Three Primate Species (Gorilla gorilla gorilla, Pan troglodytes, and Macaca fuscata)
International Journal of Primatology ( IF 2.5 ) Pub Date : 2020-02-01 , DOI: 10.1007/s10764-020-00131-0
Sarah M. Huskisson , Sarah L. Jacobson , Crystal L. Egelkamp , Stephen R. Ross , Lydia M. Hopper

Understanding captive animals’ preferences is important for their care and management. However, pairwise testing for preference can be time consuming, open to bias, and typically restricted to stimuli that can be presented manually. We tested the efficacy of using touchscreens to test zoo-housed primates’ food preferences and evaluated the primates’ understanding and interpretation of photographic stimuli. We showed 18 subjects (six gorillas, five chimpanzees, and seven Japanese macaques) four food stimuli (digital photographs of familiar foods presented via touchscreens) to test their preferences in a forced-choice paradigm. We presented preliminary single-food training trials before paired forced-choice test trials, which revealed subjects’ relative preferences for the four foods. To distinguish whether the primates’ responses represented conditioned associations between the stimuli and rewards, or a true understanding of the food photographs, we ran a follow-up study with novel stimuli (novel photographs of familiar foods). We combined the two novel stimuli with the four stimuli presented in the first experiment in pairwise forced-choice trials (importantly, without training trials). Subjects did not preferentially select or avoid the novel stimuli, suggesting they spontaneously interpreted the stimuli without training. While there was interindividual variation in preferences, subject choices were consistent across studies, even with the addition of novel stimuli. These results suggest that preferences for a variety of stimuli could be tested quickly, efficiently, and accurately using touchscreens.

中文翻译:

使用触摸屏范式评估三种灵长类动物(大猩猩大猩猩、Pan troglodytes 和 Macaca fuscata)的食物偏好和对食物新照片刺激的反应

了解圈养动物的喜好对它们的照料和管理很重要。然而,偏好的成对测试可能很耗时,容易产生偏见,并且通常仅限于可以手动呈现的刺激。我们测试了使用触摸屏来测试动物园内灵长类动物的食物偏好的有效性,并评估灵长类动物对摄影刺激的理解和解释。我们向 18 名受试者(六只大猩猩、五只黑猩猩和七只日本猕猴)展示了四种食物刺激物(通过触摸屏呈现的熟悉食物的数字照片),以测试他们在强制选择范式中的偏好。我们在配对强制选择测试试验之前展示了初步的单一食物训练试验,这揭示了受试者对四种食物的相对偏好。为了区分灵长类动物的反应是代表刺激和奖励之间的条件关联,还是对食物照片的真正理解,我们对新刺激(熟悉食物的新照片)进行了后续研究。我们将两种新颖的刺激与第一个实验中出现的四种刺激相结合,进行成对强制选择试验(重要的是,没有训练试验)。受试者不会优先选择或避免新刺激,这表明他们在没有训练的情况下自发地解释了刺激。虽然偏好存在个体间差异,但跨研究的主题选择是一致的,即使添加了新的刺激。这些结果表明,可以使用触摸屏快速、有效和准确地测试对各种刺激的偏好。
更新日期:2020-02-01
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