Reward value of brain stimulation is inversely related to uncertainty about its onset.
D000818:Animals; D001288:Attention; D001921:Brain / Q000502:physiology*; D003216:Conditioning, Operant; D004558:Electric Stimulation; D007257:Information Theory; D008297:Male; D051381:Rats; D012055:Reinforcement Schedule; D012201:Reward; D012653:Self Stimulation; D013997:Time Factors