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ERIC Number: EJ1070901
Record Type: Journal
Publication Date: 2015
Pages: 16
Abstractor: As Provided
Reference Count: 14
ISSN: ISSN-1530-5058
Impact of Inclusion of Varying Percentages of Repeaters on Equating
Rogers, W. Todd; Radwan, Nizam
International Journal of Testing, v15 n3 p177-192 2015
Restricted equating samples are often used to equate test results. Previously eligible students may be excluded because this group of students is not stable from year to year and their inclusion may bias the results. The present study evaluated the impact of including previously eligible students in the equating samples, where the percentage of repeaters varied from 5% to 40% in 5% increments. Whereas including previously eligible students in the equating samples had impact on the results for the equating samples, there was little impact on the equating results for the population. Thus it seems reasonable to include these students in the equating samples, thereby increasing the representativeness of the equating sample. Whether the findings of the study are generalizable to situations where a fixed number of common items are used in all forms to be equated and the time between the two administrations is shorter than a year needs to be addressed in future research.
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Publication Type: Journal Articles; Reports - Research
Education Level: High Schools; Secondary Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Location: Canada