Why and How to Insure that Items in the Same Pool are Appropriately Credentialed: Data Collection Strategies and Analytical Methods for Item Linking,
Abstract
After designing an adaptive test and obtaining item parameters via some calibration procedure, it is necessary to place item parameters on a common metric prior to testing it an adaptive mode. In the adaptive testing context, several subpopulations of single individuals are involved; hence, common metric considerations are critical. Several data collection strategies and analytical techniques for placing parameters on scale will be surveyed. Three basic designs for data collection are discussed: single-group, equivalent-group, and anchor-test designs. The three-parameter logistic item response theory model is introduced as the model for guiding the item linking process. Finally, several analytical procedures for item linking are described briefly.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1981
- Accession Number
- ADP001394
Entities
People
- Neil J. Dorans
Organizations
- Educational Testing Service