PRIMATE SELECTION OF FOOD BY SIZE: VISIBLE VERSUS INVISIBLE REWARDS.
D000818:Animals; D003463:Cues; D004193:Discrimination Learning; D000882:Haplorhini; D015186:Hominidae; D011323:Primates; D012106:Research; D012201:Reward; D012858:Size Perception; D013045:Species Specificity
APES; CUES; DISCRIMINATION LEARNING; EXPERIMENTAL LAB STUDY; MONKEYS; REWARD; SIZE PERCEPTION; SPECIES SPECIFICITY