List of Articles ضریب دشواری Open Access Article Abstract Page Full-Text 1 - The Scientific analysis of tests Based on Classic theory and latent trait theory Mohammad Ali Ahmadvand Open Access Article Abstract Page Full-Text 2 - Effectiveness of Options in Multiple-choice Items: the case of “none of the above” Resa Nejati Mohammad Morady Open Access Article Abstract Page Full-Text 3 - Developing a Social Studies Achievement Test for High School Students Based on Item-Response Theory (IRT) A. Orangi K. Dorani