Alper Şahin, Ph.D.
Alper Şahin holds bachelor’s and master’s degrees in English Language Teaching and a doctorate in Educational Measurement and Evaluation. He conducted his post-doctoral research on Computerized Adaptive Tests with Prof. David J. Weiss at the University of Minnesota with the support of TUBITAK. He is the author of the first State Test Anxiety Scale (DUSKÖ) originally designed in Turkish.
His research interests include but are not limited to sample size requirement in item parameter estimation using Item Response Theory, measurement accuracy in foreign language tests, precision in measurement, use of Asymmetric Theory in different disciplines, us of Asymmetric rubrics in performance assessment, and item-bank design features in computerized adaptive testing applications.
He currently serves as the Chairperson of the Department of Basic English at Atılım University, Ankara/Turkey, and as the Director of Education on the Board of Directors of the International Association for Computerized Adaptive Testing (IACAT).
For your inquiries, please contact alpersahin2@yahoo.com
Asymmetric Theory 