An empirical examination of the IRT information in polytomously scored reading items
By: John R. Donoghue
Series: Research report -- RR-93-12; Research report (Educational Testing Service) -- RR-93-12
Publisher: Educational Testing Service
Published: 1993
Place of publication: Princeton, N.J
Language: eng
Number of pages: 30
Subjects: Item response theory; Reading; Ability testing; National Assessment of Educational Progress (Project)
Other titles: Information in polytomous items.
Notes: "March 1993"--Cover.

Running title: Information in polytomous items.

Includes bibliographical references (p. 15-16).