Regression Weights as a Function of Test Length  

Oleh:

Horst, Paul

Jenis: Article from Journal - e-Journal
Dalam koleksi: Psychometrika: A Journal of Quantitative Psychology vol. 13 no. 3 (Sep. 1948), page 125-134.
Topik: Regression Weights; Test Length; Mathematical Derivation
Fulltext: Regression Weights as a Function of Test Length.pdf (331.64KB)

Isi artikel

A battery of pencil-and-paper tests is commonly used for predicting a single criterion. If the score on each test is the number of correct answers, the composite battery score would normally be the sum of the weighted test scores, where the weights are the raw score regression weights. Knowing the reliability of each test, it is possible to alter the lengths of the tests in a manner such that the weights will all be equal. The composite battery score would then simply be the total number of items answered correctly and scoring would be greatly simplified. Such simplification is particularly desirable where the volume of testing is large. Section I of the article outlines the procedure for altering the lengths of the tests, and Section II gives a proof of the method.

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