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Volume 42 - September 1977

Contents

Page 3 of 3

Notes And Comments

  • A Note on Moran’s Measure of Multiple Rank Correlation

  • Philip Bobko
  • Published online by Cambridge University Press:
    01 January 2025, pp. 311-314

  • A measure of multiple rank correlation, Ty.122, is proposed for the situation with no tied observations in the variables. The measure is a weighted average of two squared Kendall taus. It is shown that Ty.122 is equivalent to a statistic previously proposed by Moran and thus a new interpretation is given to Moran’s statistic.

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Book Review

Notes And Comments

  • The Rasch Model, the Law of Comparative Judgment and Additive Conjoint Measurement

  • H. E. Brogden
  • Published online by Cambridge University Press:
    01 January 2025, pp. 631-634

  • Relationships between the Rasch model and both the law of comparative judgment and additive conjoint measurement are discussed. The distance between the ability of Person a and the difficult of Item i is, in the Rasch model, the baseline value corresponding to the probability that a will respond correctly to i, where this probability is interpreted as the area under a logistic curve (which is substantially equivalent to the normal curve) and is thus an application of the law of comparative judgment. Under certain assumptions, the Rasch model is also a special case of additive conjoint measurement and, properly reinterpreted, may be usefully applied in contexts other than individual differences.

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Page 3 of 3