/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: AbdullahFerdous https://public.slidesharecdn.com/v2/images/profile-picture.png Dr. Abdullah Ferdous is a Principal Psychometrician in the International Development, Evaluation, and Research (IDER) program at the American Institutes for Research (AIR). He has over 17 years of experience in the field of assessment, evaluation, and research design with expertise in psychometric and statistical analysis. He also provides technical assistance, as well as capacity building and organizational supports for a wide range of large scale projects both in the international and national arenas. His technical work in assessment and psychometrics includes constructing reliable and valid test instruments, analyzing data using classical and item response theory (IRT), setting perfo...