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Download full textKolen, Michael J.; Whitney, Douglas R. – 1981
Procedures used to compare the results from item response theory as well as more traditional equating methods were described and critically analyzed. The implications of the comparison of equipercentile, linear, one-parameter (Rasch), and three-parameter methods for equating twelve forms of each of the five tests of General Educational Development…
Descriptors: Adults, Equated Scores, Equivalency Tests, Factor Analysis
Auchter, Joan Chikos; Patience, Wayne – 1989
The methods used by the General Educational Development Testing Service (GEDTS) to establish and maintain score stability and reading reliability on its direct assessment of writing are described. Using the 1988 site certification and monitoring results of several scoring sites, the focus is on describing how the score scale was established and…
Descriptors: Decentralization, Equivalency Tests, Essay Tests, Evaluators
