ERIC Number: EJ649901
Record Type: Journal
Publication Date: 2002
Reference Count: N/A
The Effect of Item Parameter Drift on Examinee Ability Estimates.
Wells, Craig S.; Subkoviak, Michael J.; Serlin, Ronald C.
Applied Psychological Measurement, v26 n1 p77-87 Mar 2002
Investigated the effect of item parameter drift on ability estimates under item response theory, simulating item response data for two testing occasions for the two-parameter logistic model under several crossed conditions. Results show that item parameter drift under the simulated conditions had a small effect on ability estimates. (SLD)
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Authoring Institution: N/A