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Statistical Programs
College of Agriculture University of Idaho
Seminar Announcement
"Applied Statistics in Agriculture"
On the Use of Mixed-Effects Models for Analyzing Probability Judgments

Presented By
Dr. Tim R. Johnson

Division of Statistics University of Idaho

Tuesday, Apr. 17
3:30 P. M.
Room 62
College of Agriculture

      During the past 30+ years there has been an accumulating body of empirical research in the behavioral sciences concerning probabilistic judgments. In particular researchers have focused on the (mis)calibration , i.e. the relationship between the judgments and the probability of an event, and the discrimination, i.e. the relationship between the judgments and the realization of an event of probabilistic judgments. Existing statistical techniques for analyzing the calibration and discrimination of probability judgments rely on the analysis of derived variables. I will present a general framework using mixed-effects regression models to directly model probability judgments and analyze their calibration and discrimination. In particular I will focus on the use of an ordinal probit mixed-effects model for the log-odds of probabilisitic judgments. My discussion will focus largely on practical matters such as model specification and inference.


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