Discrimination Learning as the Summation of Excitation and Inhibition

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Science  13 Dec 1968:
Vol. 162, Issue 3859, pp. 1303-1306
DOI: 10.1126/science.162.3859.1303


Pigeons received either excitatory, inhibitory, or combined excitatory and inhibitory (intradimensional) training to discriminate line-tilt stimuli. Algebraic summation of relative-generalization gradients obtained after separate excitatory and inhibitory training sessions was used to predict characteristics of gradients after intradimensional training. The good agreement between obtained and predicted gradients provided support for gradient-interaction theory.

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