title: A COMPARISON OF KEY-PECKING WITH AN INGESTIVE TECHNIQUE FOR THE STUDY OF DISCRIMINATIVE LEARNING IN PIGEONS.
mesh_terms: D000818:Animals; D001717:Birds; D003116:Color; D010856:Columbidae; D003463:Cues; D004193:Discrimination Learning; D006801:Humans; D012106:Research; D012193:Reversal Learning
keywords: BIRDS; COLOR; CUES; DISCRIMINATION LEARNING; EXPERIMENTAL LAB STUDY; REVERSAL LEARNING