Maximizing Test Validity by Item Selection  

Oleh:

Webster, Harold

Jenis: Article from Journal - e-Journal
Dalam koleksi: Psychometrika: A Journal of Quantitative Psychology vol. 21 no. 2 (Jun. 1956), page 153-164.
Topik: Derivation and Properties of the Exact Condition; Practical Test Construction Procedure; Item Selection Conditions; Test Homogeneity
Fulltext: Vol 21 no.2 June 1956 p.153-164.pdf (586.43KB)

Isi artikel

The exact condition for discardingk items from a test in order to obtain a residual test with higher validity is derived. A proof that validity always increases is given for the casek=1. The lack of uniqueness of maximum validity when achieved by use of the condition is discussed. With the use of additional restrictions on items to be included in the initial test, a practical test construction procedure which has several advantages over previous methods is developed. The homogeneity of tests constructed by the method is discussed, and applications are given.

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