The Connection Between Magnitude and Discrimination Scales and Direct and Indirect Scaling Methods
- 1 September 1965
- journal article
- Published by Cambridge University Press (CUP) in Psychometrika
- Vol. 30 (3) , 271-289
- https://doi.org/10.1007/bf02289491
Abstract
(1) An analysis of the method of paired comparisons shows that Case V and Case VI, the latter characterized by log-normal distributions and Weber’s law for subjective continua, are fundamentally indistinguishable. Case VI produces a log-arithmetic interval scale of subjective magnitude. (2) It is demonstrated that the difference between discrimination scales according to Case V and from category rating is due to the difference between intra- and interindividual variability yielding different Weber functions.Keywords
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