SIZE AND RELIABILITY OF FREQUENCY‐DIFFERENCE THRESHOLDS DETERMINED WITH OPERANT TRACKING PROCEDURE1

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Abstract
Auditory frequency discrimination thresholds have been determined by a “tracking procedure” at five frequencies and two intensity levels for a group of four cats. Intra‐animal thresholds were found to be quite stable, and there was good inter‐animal agreement among three of the four cats. Although quite stable, the tracking thresholds were larger than those which had been obtained using an avoidance procedure. However, because of the several differences between the tracking procedure and avoidance conditioning procedure, no conclusions can be drawn concerning the efficacy of the different types of reinforcement in determining the ultimate limit of the animals' discrimination ability.

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