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Download full textWang, Lin; Qian, Jiahe; Lee, Yi-Hsuan – ETS Research Report Series, 2013
The purpose of this study was to evaluate the combined effects of reduced equating sample size and shortened anchor test length on item response theory (IRT)-based linking and equating results. Data from two independent operational forms of a large-scale testing program were used to establish the baseline results for evaluating the results from…
Descriptors: Test Construction, Item Response Theory, Testing Programs, Simulation
Haberman, Shelby J. – Educational Testing Service, 2010
Sampling errors limit the accuracy with which forms can be linked. Limitations on accuracy are especially important in testing programs in which a very large number of forms are employed. Standard inequalities in mathematical statistics may be used to establish lower bounds on the achievable inking accuracy. To illustrate results, a variety of…
Descriptors: Testing Programs, Equated Scores, Sampling, Accuracy
Irvin, P. Shawn; Alonzo, Julie; Lai, Cheng-Fei; Park, Bitnara Jasmine; Tindal, Gerald – Behavioral Research and Teaching, 2012
In this technical report, we present the results of a reliability study of the seventh-grade multiple choice reading comprehension measures available on the easyCBM learning system conducted in the spring of 2011. Analyses include split-half reliability, alternate form reliability, person and item reliability as derived from Rasch analysis,…
Descriptors: Reading Comprehension, Testing Programs, Statistical Analysis, Grade 7
Cook, Linda L.; Petersen, Nancy S. – 1986
This paper examines how various equating methods are affected by: (1) sampling error; (2) sample characteristics; and (3) characteristics of anchor test items. It reviews empirical studies that investigated the invariance of equating transformations, and it discusses empirical and simulation studies that focus on how the properties of anchor tests…
Descriptors: Educational Research, Equated Scores, Error of Measurement, Evaluation Methods
Cromack, Theodore R. – 1979
The validity, reliability, and item characteristics of the Maine Real Estate Licensure Examination were investigated. Its validity was based on its construction; a task analysis was performed on real estate broker and salesperson jobs, items were written by trained personnel; and the test was reviewed by a panel of experts. Differences in scores…
Descriptors: Certification, Differences, Equivalency Tests, Error of Measurement
