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)
Authors
- Peer Reviewed
- F
- Publication Type
- ['Speeches/Meeting Papers', 'Reports - Research']
- Published in
- United States of America
Table of Contents
- DOCUMENT RISOME 1
- EH 194 636 1
- TM 800 768 1
- An Introduction Yo Pasch Measurement i.nd-Itt 1
- Application tc Test Equating in the Comprehensive 27p. Paper presented at the Annual Meeting cf the Northern Illincis AsScciation for Educational 1
- Assessment Program. 1
- PUB DATE May BO 1
- Research Evaluation and Development 4th 1
- Bloomingdale IL May 9 1
- EDRS PRICE DESCRIPTORS 1
- MFOIPCO2 Plus Postage 1
- Achievement Tests Difficulty Level Elementary 1
- Secondary Education Equated Scores Latent Trait 1
- Theory Mathematical Models Reading Tests Student 1
- Evaluation TestItems Test Theory 1
- IDENTIFIERS 1
- Comprehensive Assessment Program Rasch Model 1
- Unidimensional Scaling Vertical Equating. 1
- ABSTRACT 1
- The Rasch Model is describedas a latent -trait model were developed and 1
- 1977Rasch 5
