Some effects of context on the slope in magnitude estimation.

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Abstract
Magnitude estimates of the loudness of 1000-cps tones were obtained under 18 different conditions; i.e., all possible combinations of (1) high, medium, or low standard stimulus, (2) high, medium, or low sets of comparison stimuli, and (3) presence or absence of the standard stimulus before each judgment. 10 Ss served in each condition. The results are explainable as due to S's tendency to apply the same range of numerals to whatever physical range is presented. A change in subjective O is also a possible explanation. It must also be pointed out that the context effects seem less severe than in, e.g., the method of bisection. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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