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ERIC Number: ED568075
Record Type: Non-Journal
Publication Date: 2012
Pages: 44
Abstractor: As Provided
Reference Count: 37
ISBN: N/A
ISSN: N/A
Estimating Achievement Gaps from Test Scores Reported in Ordinal "Proficiency" Categories
Ho, Andrew D.; Reardon, Sean F.
Grantee Submission
Test scores are commonly reported in a small number of ordered categories. Examples of such reporting include state accountability testing, Advanced Placement tests, and English proficiency tests. This paper introduces and evaluates methods for estimating achievement gaps on a familiar standard-deviation-unit metric using data from these ordered categories alone. These methods hold two practical advantages over alternative achievement gap metrics. First, they require only categorical proficiency data, which are often available where means and standard deviations are not. Second, they result in gap estimates that are invariant to score scale transformations, providing a stronger basis for achievement gap comparisons over time and across jurisdictions. We find three candidate estimation methods that recover full-distribution gap estimates well when only censored data are available. [This paper is published in "Journal of Educational and Behavioral Statistics" v37 n4 p489-517 Aug 2012 (EJ973866).]
Publication Type: Reports - Descriptive
Education Level: N/A
Audience: N/A
Language: English
Sponsor: Institute of Education Sciences (ED)
Authoring Institution: N/A
Identifiers - Assessments and Surveys: National Assessment of Educational Progress
IES Funded: Yes
Grant or Contract Numbers: R305A070377