01482nas a2200145   4500008003900000245006500039210006500104300001200169490000700181520102700188100002001215700002501235700002301260856005301283       2006                          d00aOptimal Testlet Pool Assembly for Multistage Testing Designs0 aOptimal Testlet Pool Assembly for Multistage Testing Designs  a204-2150 v303 a<p>Computerized multistage testing (MST) designs require sets of test questions (testlets) to be assembled to meet strict, often competing criteria. Rules that govern testlet assembly may dictate the number of questions on a particular subject or may describe desirable statistical properties for the test, such as measurement precision. In an MST design, testlets of differing difficulty levels must be created. Statistical properties for assembly of the testlets can be expressed using item response theory (IRT) parameters. The testlet test information function (TIF) value can be maximized at a specific point on the IRT ability scale. In practical MST designs, parallel versions of testlets are needed, so sets of testlets with equivalent properties are built according to equivalent specifications. In this project, the authors study the use of a mathematical programming technique to simultaneously assemble testlets to ensure equivalence and fairness to candidates who may be administered different testlets.</p>
1 aAriel, Adelaide1 aVeldkamp, Bernard, P1 aBreithaupt, Krista  uhttp://apm.sagepub.com/content/30/3/204.abstract