Explanation of rewards that do not reduce tissue needs.
D000339:Affect; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D001362:Avoidance Learning; D001519:Behavior; D001887:Boredom; D003213:Conditioning, Psychological; D003220:Conflict, Psychological; D004328:Drive; D004597:Electroshock; D005106:Exploratory Behavior; D000882:Haplorhini; D006801:Humans; D006815:Hunger; D008124:Locomotion; D009042:Motivation; D011582:Psychological Theory; D051381:Rats; D012201:Reward; D012677:Sensation; D012683:Sensory Deprivation; D012890:Sleep; D013894:Thirst; D014796:Visual Perception