By Brosnan, Sara F; De Waal, Franz B. M.

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However, this is also one of the most complex of the possibilities. NAEP’S YEAR 2000 MARKET-BASKET STUDY: WHAT DO WE EXPECT TO LEARN? John Mazzeo John Mazzeo, executive director of ETS’s School and College Services, told workshop participants that the ETS year-2000 study on the market basket was designed with three goals in mind: (1) to produce and evaluate a market-basket report of NAEP results; (2) to gain experience with constructing market-basket short forms; and (3) to conduct research on the THE PERSPECTIVES OF NAEP’S SPONSORS AND CONTRACTORS 27 methodological and technical issues associated with implementing a market-basket reporting system.

To support inferences about performance on one version of the short form to performance on another version of the short form, the short forms would need to be strictly parallel in the full technical sense. Creating parallel short forms would not be a sufficient condition to support inferences from scores on the short forms to the main NAEP scale, however. Much more complex statistical procedures would be needed to enable generalizations about performance on main NAEP based on performance on the short form.

David Thissen, professor of psychology at the University of North Carolina, emphasized this pointing out that “NAEP’s use of the IRT scale in the past two decades has done a great deal to legitimize such IRT procedures with the result that many other assessments now use IRT scales. . ” NAEP uses some of the most sophisticated and high-quality analytic and reporting methods available. If NAEP moves away from such procedures to a simpler percent correct metric, others will surely follow suit. Many discussants maintained that they did not see the benefits of the simpler metric.

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Responses to a simple barter task in chimpanzees, Pan troglodytes by Brosnan, Sara F; De Waal, Franz B. M.


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