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Science 4 September 1959:
Vol. 130. no. 3375, pp. 570 - 572
DOI: 10.1126/science.130.3375.570
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Articles

Self-Regulation of Brain-Stimulating Current Intensity in the Rat

LARRY STEIN 1 and OAKLEY S. RAY 1

1 Veterans Administration Research Laboratories in Neuropsychiatry, Leech Farm Road, Pittsburgh, Pa.

A modification of the self-stimulation technique of Olds enabled rats to regulate and maintain at a preferred level the amount of brain-stimulating current they received as reinforcement for lever pressing. The method used two levers to deliver brief brain shocks: each response at one lever increased the current intensity a small step and each response at the other lowered it one step.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)