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Impact of Design Effects in Large-Scale District and State Assessments
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Phillips, Gary W. – Applied Measurement in Education, 2015
This article proposes that sampling design effects have potentially huge unrecognized impacts on the results reported by large-scale district and state assessments in the United States. When design effects are unrecognized and unaccounted for they lead to underestimating the sampling error in item and test statistics. Underestimating the sampling…
Descriptors: State Programs, Sampling, Research Design, Error of Measurement
Simultaneous Use of Multiple Answer Copying Indexes to Improve Detection Rates
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Wollack, James A. – Applied Measurement in Education, 2006
Many of the currently available statistical indexes to detect answer copying lack sufficient power at small [alpha] levels or when the amount of copying is relatively small. Furthermore, there is no one index that is uniformly best. Depending on the type or amount of copying, certain indexes are better than others. The purpose of this article was…
Descriptors: Statistical Analysis, Item Analysis, Test Length, Sample Size
Does the Use of Test Assembly Procedures Proposed in Legislation Make Any Difference in Test Properties and in the Test Performance of Black and White Test Takers?
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Marco, Gary L. – Applied Measurement in Education, 1988
Four simulated mathematical and verbal test forms were produced by test assembly procedures proposed in legislative bills in California and New York in 1986 to minimize differences between majority and minority scores. Item response theory analyses of data for about 22,000 black and 28,000 White high-school students were conducted. (SLD)
Descriptors: Black Students, College Entrance Examinations, Comparative Analysis, Culture Fair Tests