Categorization of natural stimuli by monkeys (macaca mulatto)- effects of stimulus set size and modification of exemplars

The concept humans was studied in two experiments on rhesus monkeys, in each of which a two-choice simultaneous discrimination procedure was used. In Experiment 1, the choice was between scenes with humans and scenes without humans, with the slide set sizable enough that a large number of trials could be given without repeating any individual […]