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Abstract

Four coatis were trained and tested on a relational concept of sameness-difference involving two-dimensional visual patterns. When exposed, after successful training, to a set of 18 novel stimuli all subjects showed significant above-chance transfer. Performance with stimuli of distinctly different design from the training set was better than with stimuli of similar design. Responding correctly not only to “shape” but also to “color” the subjects applied the sameness concept to a further cue dimension as well. The results are discussed with respect to nonconceptual variables, and learning-set formation.