Difficulty prediction of test items.
Series: Contributions to education -- no.941.
Publisher: Bureau of Publications, Teachers College, Columbia University; AMS Press
Place of publication: New York; [New York
Number of pages: 55
Subjects: Intelligence tests
Notes: Reprint of the 1947 ed., issued in series: Teachers College, Columbia University.

Contributions to education, no.941.

Originally presented as the author's thesis, Columbia.

Bibliography: p.54-55.