Note on Construction of an Item Analysis Table for the High-Low-27-per-cent Group Method  

Oleh:

Fan, C. T.

Jenis: Article from Journal - e-Journal
Dalam koleksi: Psychometrika: A Journal of Quantitative Psychology vol. 19 no. 3 (Sep. 1954), page 231-237.
Topik: Item Analysis Table; Values of pH and pL; Values of r and p
Fulltext: Vol 19 No 3 Sept 1954 p.231-237.pdf (362.43KB)

Isi artikel

This paper describes the construction of a new item analysis table for the high-low-27-per-cent group method. The table provides a ready means of translating the observed proportions of success in the two extreme groups (p H ,p L ) into measures of item difficulty and item discrimination (p, ?, andr). The tabled values of both the difficulty index,p, and the discrimination index,r, have been derived from Karl Pearson's tables of the normal bivariate surface.

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