Increased incidence of non-tasters of phenylthiocarbamide among congenital athyreotic cretins |
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Authors: | SHEPARD T H GARTLER S M |
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Abstract: | Monkeys can be trained to press a lever to obtain intracranial brain stimulation on a large fixed-ratio schedule as well as on a continuous reinforcement schedule. A long extinction curve appears to be indicative of a future high fixed-ratio performance. |
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