Testing The Equality of Independent Alpha Coefficients Adjusted for Test Lenght  

Oleh:

Feldt, Leonard S. ; Alsawalmeh, Yousef M.

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Educational and Psychological Measurement vol. 59 no. 3 (1999), page 373-383.
Topik: independent study; achievement tests; educational evaluation
Fulltext: 373.pdf (100.46KB)

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Perpustakaan Pusat (Semanggi) Nomor Panggil: EE30.3 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

It comparing the merits of different item types or test formats, test developers are oftern called on to make a rigorous comparison of the internal consistency reliabilities of the scores from two competing tests. Such comparisons should be made for tests of equal length in terms of time demands and speededness. If the experimental instruments used in the girls trials were not equal in length, estimates of the reliabilities of scores on equal - length tests can be obtained by applying the spearman - brown formula. In this article, the authors develop a statistical test for the hypothesis that A1 = A2, where A is the extrapolated value of cronbach's alpha reliability for test i. The test is shown to exercise tight control of type I error.

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