A study of the nature of difficulty
By: by Jacob S. Orleans. New York, Bureau of Publications, Teachers College, Columbia University, 1926.
Publisher: AMS Press; Ams Pr Inc
Published: 1972
Place of publication: [New York
Language: eng
Number of pages: 39
Subjects: Educational tests and measurements.
Notes: Bibliography: p. 38-39.
Reprint of the 1926 ed., issued in series: Teachers College, Columbia University. Contributions to education, no. 206.
Originally presented as the author's thesis, Columbia.