PSYCHOPHYSICAL METHODOLOGY II. COMPARISON OF MEANS AND OF STANDARD DEVIATIONS OF THE ASCENDING AND DESCENDING METHOD OF LIMITS.

Abstract

Assume that the probability of a 'Yes' response increases as the stimulus intensity increases. Then, on the basis of probability considerations alone (a) the mean threshold of the descending method of limits (DML) is greater than the mean threshold of the ascending method of limits (AML) and (b) sigma of the DML threshold distribution may be greater than, equal to, or less than sigma of the AML threshold distribution. Therefore, (a) the present method for evaluating errors of expectation and habituation is erroneous, (b) the 'just not noticeable difference' (jnnd) should always be larger than the 'just noticeable difference' (jnd), (c) conclusions about relative precision based on a comparison of sigma s are wrong. (Author)

Document Details

Document Type
Technical Report
Publication Date
Dec 31, 1965
Accession Number
AD0628995

Entities

People

  • Robert M. Herrick

Organizations

  • Naval Air Warfare Center Warminster

Tags

DTIC Thesaurus Topics

  • Computing-Related Activities
  • Data Science
  • Information Science
  • Intensity
  • Interdisciplinary Science
  • Mathematics
  • Precision
  • Probability
  • Standards

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  • Computational Modeling and Simulation
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