The Reliability of a Point Biserial Coefficient of Correlation  

Oleh:

Perry, Norman C. ; Michael, William B.

Jenis: Article from Journal - e-Journal
Dalam koleksi: Psychometrika: A Journal of Quantitative Psychology vol. 19 no. 4 (Dec. 1954), page 313-325.
Topik: Biserial Coefficient; Correlation
Fulltext: Vol 19 No 4 Dec 1954 p.313-325.pdf (549.34KB)

Isi artikel

An attempt is made to elaborate upon Lev's results concerning the reliability of the point biserial coefficient of correlation in a manner that will be helpful to the psychological statistician. Procedures required in the use of the non-centralt tables prepared by Johnson and Welch are described as they relate to the determination of the fiducial limits for a point biserial coefficient. A normal approximation technique for the estimation of fiducial limits is also suggested. Numerical evidence is presented which shows that relative to a given level of significance the width of the fiducial interval estimated from a point biserial coefficient of any size is smaller than that of the fiducial interval corresponding to an ordinary Pearsonian coefficient of the same magnitude.

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