Abstract
Pavlov's cortical irradiation hypothesis was put to test by establishing a conditioned GSR to tactile stimulation of the chest and by then comparing the amount of generalization at chin and forehead. As the sensory representation of the face on the cortex is inverted in comparison with the remainder of the body it can be hypothesized that there will be greater generalization to the forehead. In an experimental group of 10 Ss the opposite effect was found, that is, there was a larger response at the chin. Evidence obtained from a control group of 10 Ss suggests that results were not confounded by the continuing presence of the UCR. It is concluded that Pavlov's theory is untenable.
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