title: SIGNAL DETECTION IN FIXED-RATIO SCHEDULES.
mesh_terms: D000818:Animals; D001522:Behavior, Animal; D001717:Birds; D004193:Discrimination Learning; D011589:Psychology, Experimental; D011601:Psychophysics; D012106:Research
keywords: BEHAVIOR, ANIMAL; BIRDS; DISCRIMINATION LEARNING; EXPERIMENTAL LAB STUDY; PSYCHOLOGY, EXPERIMENTAL