University of Tehran Journal of Applied Psychological Research 2251-8126 9 3 2018 09 23 Psychometric Properties of the Reynolds Intellectual Assessment Scales(RIAS)- Second Edition in students with Intellectual Developmental Disorder Psychometric Properties of the Reynolds Intellectual Assessment Scales(RIAS)- Second Edition in students with Intellectual Developmental Disorder 161 179 69114 10.22059/japr.2018.69114 FA Lida Tebyani Nian phd Department of Exceptional Children Psychology, Faculty of Humanities and Social Sciences, Science &amp; Research Branch, Islamic Azad University. Tehran.Iran Kambiz Kamkari Ph.D. in Psychology and Exceptional Children Education, Assistant Professor, Islamic Azad University, Islamshahr Branch Masoud Lavasani Faculty of Psychology and Educational Sciences, University of Tehran, Tehran, Iran Journal Article 2018 12 31 The Aim of this study was "Psychometric Properties of the Second Edition of the Reynolds Intellectual assessment scales in Students with Intellectual Developmental Disorder. This research is a methodological and developmental design. The second version of the Reynolds Intellectual assessment Scale has 8 sub-tests (4 main sub-tests and 4 Additional sub-tests), which provides 5 IQs and 8T scores. After translating and Accommodation, as well as performing in the pilot phase (30 people), analyzes were conducted at the level of the question and the questions were sorted out. Then a try out version (100) and a final version (150) were implemented with purposeful sampling on students with intellectual disability. Psychometric analyzes were carried out in the field of Reliability (internal consistency, halving, stability coefficient) and validity (concurrent validity, diagnostic validity). The findings show that this tool has psychometric soundness in students with intellectual disability, and given its rapid implementation, it can be used as a powerful and reliable tool for screening and <br />identification purposes and research. The Aim of this study was "Psychometric Properties of the Second Edition of the Reynolds Intellectual assessment scales in Students with Intellectual Developmental Disorder. This research is a methodological and developmental design. The second version of the Reynolds Intellectual assessment Scale has 8 sub-tests (4 main sub-tests and 4 Additional sub-tests), which provides 5 IQs and 8T scores. After translating and Accommodation, as well as performing in the pilot phase (30 people), analyzes were conducted at the level of the question and the questions were sorted out. Then a try out version (100) and a final version (150) were implemented with purposeful sampling on students with intellectual disability. Psychometric analyzes were carried out in the field of Reliability (internal consistency, halving, stability coefficient) and validity (concurrent validity, diagnostic validity). The findings show that this tool has psychometric soundness in students with intellectual disability, and given its rapid implementation, it can be used as a powerful and reliable tool for screening and <br />identification purposes and research. https://japr.ut.ac.ir/article_69114_dd17f824776acaba60131e5da0ef7547.pdf