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Toward a Psychometrics for Testlets NCARB

Wainer, Howard; Lewis, Charles
Publication Year:
Report Number:
ETS Research Report
Document Type:
Page Count:
Subject/Key Words:
Computer-Assisted Testing, Models, National Council of Architectural Registration Boards (NCARB), Psychometrics, Reading Tests, Test Construction, Testlet


In 1987 the testlet was introduced as one way of dealing with a variety of problems that might occur with the algorithmic construction of tests. In the short time since this introduction, its range of plausible usages has been broadened considerably through the work of other researchers. This paper examines three different applications of the testlet concept and describe the psychometric models which seem most suitable for each application. In each case, the testlet concept gracefully solves a problem that would have been awkward with other, more traditional approaches.

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