This fall COMET celebrated its first birthday. Its goal for next year is improvement in the communication of measurement results in oral and written presentations to lay audiences. At our meeting on November 14th, 1994, Jerry D'Agostino, MESA graduate student and consultant to the Chicago Board of Education, presented his research into measuring key school classroom variables such as social support, student engagement, coherence of material, and others. He presented a problem concerning the interpretation of classroom ratings as measures when the ratings have first been aggregated into summaries. COMET participants recommended disaggregating the summaries, computing person measures, and plotting the person measures for the hypothesized variables across grade levels. This approach first identifies the unique variables, then establishes their robustness across years of schooling. A comment was made that this approach represents a means of reproducing the multidimensional character of social experience in a unidimensional framework. In a second presentation, Donna Tatum, measurement consultant to several large corporations, presented an analysis of marketing data implementing paired comparison methodology. Her early results revealed redundancies in the items that were administered and implied the need for new items.
COMET meetings are held monthly in Judd Hall at the University of Chicago, and are open to all.
Nikolaus Bezruczko
Chicago Objective Measurement Table. Bezruczko N. Rasch Measurement Transactions, 1994, 8:3 p.381
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