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个人简介
Research Interests
My research interests are in the development and application of item response theory (IRT) models to measure psychological constructs. Over the past two decades, I have developed a family of polytomous IRT models to unfold responses to test or questionnaire items. These unfolding models imply higher item scores to the extent that an individual is located close to an item on a unidimensional latent continuum. Unfolding item response models can be used to measure attitudes using responses from traditional Likert or Thurstone scales. They can also be used to assess satisfaction, preference, personality and individual differences in certain developmental processes that occur in distinct stages. My research and development efforts with unfolding IRT models have been recognized by the National Science Foundation via its Faculty Early Career Development (CAREER) Award, and the computer freeware spawned by this work (GGUM2004) has been used by researchers worldwide.
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