The Effect of Difficulty and Chance Success on item-Test Correlation and on Test Reliability  

Oleh:

Plumlee, Lynnette B.

Jenis: Article from Journal - e-Journal
Dalam koleksi: Psychometrika: A Journal of Quantitative Psychology vol. 17 no. 1 (Mar. 1952), page 69-86.
Topik: Item-Test Correlation; Test Reliability; Prediction Equation
Fulltext: The Effect of Difficulty and Chance Success on item-Test Correlation and on Test Reliability.pdf (801.91KB)

Isi artikel

An equation is derived for predicting the effect of chance success, relative to item difficulty, on item-test correlation. The values predicted by this equation and by equations derived by Guilford and Carroll for predicting the effect of chance success on item difficulty and test reliability are compared with empirical values in an experiment which used identical test items in multiple-choice and answer-only form.

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