Estimating the Internal Consistency Reliability of Tests Composed of Testlets Varying in Length.

Feldt, Leonard S.

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Peer reviewed

ERIC Number: EJ649886

Record Type: Journal

Publication Date: 2002

Pages: N/A

Abstractor: N/A

ISBN: N/A

ISSN: ISSN-0895-7347

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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)

Descriptors: Estimation (Mathematics), Reliability, Statistical Bias, Test Format, Test Length

Publication Type: Journal Articles; Reports - Research

Education Level: N/A

Audience: N/A

Language: English

Sponsor: N/A

Authoring Institution: N/A

Identifiers - Assessments and Surveys: Iowa Tests of Basic Skills

Grant or Contract Numbers: N/A

Author Affiliations: N/A