ERIC Number: EJ649886
Record Type: Journal
Publication Date: 2002
Reference Count: N/A
Estimating the Internal Consistency Reliability of Tests Composed of Testlets Varying in Length.
Feldt, Leonard S.
Applied Measurement in Education, v15 n1 p33-48 2002
Considers the degree of bias in testlet-based alpha (internal consistency reliability) through hypothetical examples and real test data from four tests of the Iowa Tests of Basic Skills. Presents a simple formula for computing a testlet-based congeneric coefficient. (SLD)
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Authoring Institution: N/A
Identifiers - Assessments and Surveys: Iowa Tests of Basic Skills