Аннотация:Two juvenile orange-winged amazons (Amazona amazonica) were trained to match stimuli by color, shape, and number of items, but not size. They needed a total of 1152 and 1876 training trials before the testing began. After learning these various IMTS tasks, the parrots transferred discriminative responding to new stimuli from the same categories that were used in training (another colors, shapes and number of items) as well as to stimuli from an different category (stimuli varying in size). In the final testing, both parrots spontaneously exhibited relational matching-to-sample behavior: they were able to perceive the relationship between items in the sample stimulus pair and match this relation to that between items in the
comparison stimulus pair (same size, same shape and same color between items). They made 70,8% and 80,2% correct choices (same size), 77,0% and 75,0% correct choices (same shape) and 71,9% and 69,8% correct choices (same color)over 96 relational trials.
http://www.comparativecognition.org/CO3%202015%20Program%20FINAL.PDF