Categorization of Photographic Images by Rats Using Shape-Based Image Dimensions

摘要: Strong interest exists in developing a rodent model of visual cognition to conduct research into the neural mechanisms categorization. Yet, doubt remains as whether rats perform categorization tasks do humans and nonhuman primates. Here, we trained eight on two using photographs objects from each four basic-level categories: chairs, flowers, cars, humans. In Experiment 1, learned categorize chairs versus flowers; 2, cars After discrimination, tested them with novel pictures categories. The performed at reliably above-chance levels during these generalization tests. To determine which dimension(s) stimuli controlled rats' behavior, conducted regression analyses several image dimensions. chair flower discrimination was mainly by convexity stimuli, whereas car human aspect ratio stimuli. These results demonstrate that can complex shape-based properties photographs.