ERIC Number: EJ788913
Record Type: Journal
Publication Date: 2008
Pages: 18
Abstractor: Author
ISBN: N/A
ISSN: ISSN-0013-1644
EISSN: N/A
Available Date: N/A
A Modification to Angoff and Bookmarking Cut Scores to Account for the Imperfect Reliability of Test Scores
MacCann, Robert G.
Educational and Psychological Measurement, v68 n2 p197-214 2008
It is shown that the Angoff and bookmarking cut scores are examples of true score equating that in the real world must be applied to observed scores. In the context of defining minimal competency, the percentage "failed" by such methods is a function of the length of the measuring instrument. It is argued that this length is largely arbitrary, being heavily influenced by practical educational constraints. Hence, there is an ambiguity or nonuniqueness about the percentage failed. An argument is advanced that the failure rate should reflect the percentage of true scores below the cut score. A modification to the cut score is derived that achieves this outcome and simultaneously removes the nonuniqueness in the percentage failed. (Contains 2 figures and 3 tables.)
Descriptors: True Scores, Cutting Scores, Minimum Competencies, Scores, Reliability, Standard Setting (Scoring), Academic Achievement, Error of Measurement, Foreign Countries
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Publication Type: Journal Articles; Opinion Papers; Reports - Evaluative
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Location: Australia
Grant or Contract Numbers: N/A
Author Affiliations: N/A