Data sparseness and online pretest item calibration/scaling methods in CAT
By: Jae-Chun Ban...[et al.].
Series: ACT research report series -- 2002-1.; ACT research report series -- 02-1.
Publisher: ACT, Inc.
Published: 2002
Place of publication: Iowa City, Iowa
Language: eng
Number of pages: 20
Subjects: Educational tests and measurements; Computer adaptive testing; Examinations -- Design and construction -- Data processing; Item response theory -- Mathematical models; Scaling (Social sciences); Examinations -- Validity
Notes: "January 2002"

Includes bibliographical references (p. 19-20).