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  • Title: FORCE GRADIENTS IN STIMULUS GENERALIZATION.
    Author: COLE JL.
    Journal: J Exp Anal Behav; 1965 Jul; 8(4):231-41. PubMed ID: 14342030.
    Abstract:
    Pigeons were trained to peck with differing force requirements on a key specially designed to measure and control force of pecking without changes in the mechanical threshold. Following training on a key illuminated by a single wavelength, a generalization test was given. Force and rate gradients were obtained. Force gradients were shown to have a form similar to rate gradients. The slope of the force gradients was a direct function of the force of responding at the conclusion of training. Rate gradients were independent of the force of responding.
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