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ERIC Number: ED194636
Record Type: Non-Journal
Publication Date: 1980-May
Pages: 27
Abstractor: N/A
Reference Count: N/A
An Introduction to Rasch Measurement and Its Application to Test Equating in the Comprehensive Assessment Program.
Engelhard, George, Jr.
The Rasch model is described as a latent trait model which meets the five criteria that characterize reasonable and objective measurements of an individual's ability independent of the test items used. The criteria are: (1) calibration of test items must be independent of particular norming groups; (2) measurement of individuals must be independent of particular items used for measuring; (3) test items must measure a single underlying trait or ability; (4) a more able individual must have a better chance of success with an item than a less able individual; and (5) an individual must have a better chance of success on an easy item than on a difficult item. To illustrate the use of the Rasch model for vertical equating, equal interval scales (EIS) were developed and applied to the Scott, Foresman Comprehensive Assessment Program (CAP), a coordinated series of tests and measures for evaluating students' educational growth. (Author/MH)
Publication Type: Speeches/Meeting Papers; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A