Understanding Bias in Proportion Production

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Authors
  1. Hollands, J.G.
  2. Tanaka, T.
  3. Dyre, B.P.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN)
Abstract
The Stevens exponent (Beta) can be obtained from proportion estimation judgments using the power model. In this article, the authors extend that model to proportion production, in which the relative magnitudes of 2 stimuli are adjusted to correspond to a numeric proportion (e.g., ¼ or .25). The model predicts that when Beta < 1,small proportions are under produced, and large proportions are overproduced, but it predicts the reverse which Beta > 1, which is the opposite of the predicted patterns for estimation. Eight participants estimated and produced magnitudes and proportions with spatial volume (Beta < 1; Experiment 1) and color saturation (B > 1; Experiment 2). The model’s predictions were generally supported. An extension of the model using reference points can account for multicycle patterns shown by some participants.
Report Number
DCIEM-SL-2000-074 — Scientific Literature
Date of publication
24 Aug 2001
Number of Pages
12
DSTKIM No
CA024494
CANDIS No
522069
Format(s):
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