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Item Analysis

  1. Thomas P. Hogan

Published Online: 30 JAN 2010

DOI: 10.1002/9780470479216.corpsy0473

Corsini Encyclopedia of Psychology

Corsini Encyclopedia of Psychology

How to Cite

Hogan, T. P. 2010. Item Analysis. Corsini Encyclopedia of Psychology. 1–2.

Author Information

  1. University of Scranton

Publication History

  1. Published Online: 30 JAN 2010


Item analysis refers to a family of techniques for examining characteristics of test items. Most psychological tests consist of a collection of individual items. Test developers use item analysis techniques to evaluate these test items, eliminate poorly performing items, include nicely performing items, and apprise test users of test features resulting from the selection of items. In formal test development projects, item analysis precedes preparation of the final test. In less formal applications, item analysis may occur only after administration of the final test to indicate quality of the test.


  • item difficulty;
  • item discrimination;
  • differential item functioning;
  • item response theory;
  • classical test theory