Reinforcing effect of brain stimulation on runway performance as a function of interval between trials.

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Abstract
Rats were given 10 trials a session for 12 sessions in a runway, at the end of which they received electrical stimulation of the hypothalamus. On 1/2 the trials, S pressed a bar for the stimulation; on the other 1/2, E turned on the stimuli. For 1/2 the Ss trials were massed; for the other 1/2, they were spaced. Speed increased over days and was faster with massed trials. Massed practice also showed greater increases in speed within a session, but there was no significant difference during extinction. Self-stimulation appeared less effective than being stimulated by E. Similar studies in an obstruction box tended to confirm these findings. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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