Infant sucking in response to variations in schedules of feeding reinforcement.
D000367:Age Factors; D001288:Attention; D002657:Child Development; D005247:Feeding Behavior; D006801:Humans; D007223:Infant; D007227:Infant Nutritional Physiological Phenomena; D008895:Milk, Human; D012055:Reinforcement Schedule; D013391:Sucking Behavior