Boitano, J J Effects of partial reinforcement on speed of approach responses in goldfish (Carassius auratus). [electronic resource] - Psychological reports Jun 1968 - 741-4 p. digital Publication Type: Journal Article ISSN: 0033-2941 Standard No.: 10.2466/pr0.1968.22.3.741 doi Subjects--Topical Terms: AnimalsExtinction, PsychologicalFishesReinforcement ScheduleReinforcement, Psychology