A tactile generalization gradient for a pseudo-conditioned response.

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Abstract
Ayg. galvanic skin responses of 15 subjects to vibro-tactile stimulators placed along the back gave a clear-cut gradient of response amplitude after the presentation of a number of shocks. The gradient sloped away from the point where the shocks were delivered. This generalization gradient must be explained in terms of some persisting central state. The polarity of the pseudo-conditioned gradient involved might be explained as the result of conditioning by spatial instead of the usual temporal contiguity. The appearance of a response gradient without associative conditioning implies that such gradients may not be primarily the result of the paired stimulation during conditioning, although the polarity of the response gradient can be established by paired reinforcement.

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