Reliability Formulas That do not Assume Experimental Independence  

Oleh:

Guttman, Louis

Jenis: Article from Journal - e-Journal
Dalam koleksi: Psychometrika: A Journal of Quantitative Psychology vol. 18 no. 3 (Sep. 1953), page 225-239.
Topik: Reliability Formulas; Experimental Independence; Retests and of Parallel Tests; Parameters
Fulltext: Vol 18 No 3 Sept 1953 p.225-239.pdf (634.62KB)

Isi artikel

Tautologies are established for the reliability coefficient? 2 t of the sum ofn part scores. It is not assumed that the part scores are experimentally independent of each other nor that the parts are equivalent to each other. The tautologies show the exact role played by experimental dependence and nonequivalence of parts, respectively, in the reliability of the sum. The formal algebra is appropriate to reliability in the sense of repeated trials of the same test, as well as in the sense of a universe of parallel tests, although the empirical meanings are different. Emphasis is on practical formulas that require information from only a single experiment (or test). These can take the form only of lower bounds to? 2 t , four of which are developed.

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