Effects of item difficulty heterogeneity on the estimation of true-score and classification consistency
By: Judith A. Spray, Catherine J. Welch
Contributors: Welch, Catherine J; American College Testing Program
Series: ACT research report series -- 87-11; ACT research report -- 87-11
Publisher: American College Testing Program
Published: 1988
Place of publication: Iowa City, Iowa
Language: eng
Number of pages: 19
Subjects: ACT Assessment -- Validity
Notes: "September 1987."

Bibliography: p. 14