ERIC Number: EJ633939
Record Type: Journal
Publication Date: 2001
Reference Count: N/A
The Effects of Test Length and Sample Size on the Reliability and Equating of Tests Composed of Constructed-Response Items.
Fitzpatrick, Anne R.; Yen, Wendy M.
Applied Measurement in Education, v14 n1 p31-57 2001
Examined the effects of test length and sample size on the alternate forms reliability and equating of simulated mathematics tests composed of constructed response items scaled using the two-parameter partial credit model. Results suggest that, to obtain acceptable reliabilities and accurate equated scores, tests should have at least 8 6-point items or at least 12 items with 4 or more score points per item. (SLD)
Publication Type: Journal Articles; Reports - Evaluative; Speeches/Meeting Papers
Education Level: N/A
Authoring Institution: N/A