The influence of amount of practice upon the formation of a scale of judgment.

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Abstract
"Two hundred four individuals were called upon to make judgments upon a practice series of weights which consisted of four heavy weights or four light weights, and then were given an expanded scale of weights. The major results suggest that: 1. The center of the scale of judgment for the expanded range of stimuli will be at first in the direction of the center of the previously existing scale, and then, as the scale approaches the stimulus-range, begins to oscillate. 2. Over a period of time the scales rapidly conform to the stimulus-range regardless of whether or not the practice series contained stimuli at the top or bottom of the expanded scales. 3. There is a definite effect of different amounts of practice upon the first judgment of stimuli in the expanded stimulus-range. The greater the amount of practice, the more slowly does the scale of judgment shift to its new position. 4. Whether there is a prolonged effect of the practice series upon the center of the new scale is questionable . . …" (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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