Multistage Computerized Adaptive Testing With Uniform Item Exposure

Michael C. Edwards, David B. Flora, David Thissen

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


This article describes a computerized adaptive test (CAT) based on the uniform item exposure multi-form structure (uMFS). The uMFS is a specialization of the multi-form structure (MFS) idea described by Armstrong, Jones, Berliner, and Pashley (1998). In an MFS CAT, the examinee first responds to a small fixed block of items. The items comprising that block may be unrelated to each other, or they may comprise a testlet (Wainer and Kiely, 1987) After the first block of items has been administered, adaptation takes place in the choice of the next block to be administered and subsequent blocks. The uMFS design integrates item exposure control, as well as content balancing and other test development needs, into the design of the CAT, instead of placing those activities in the online implementation. We show that it is possible to implement item exposure control, in a very thorough way, in the psychometric specifications of the item blocks.

Original languageEnglish (US)
Pages (from-to)118-141
Number of pages24
JournalApplied Measurement in Education
Issue number2
StatePublished - Apr 2012
Externally publishedYes

ASJC Scopus subject areas

  • Education
  • Developmental and Educational Psychology


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