Psychometric Properties of the Reynolds Intellectual Assessment Scales(RIAS)- Second Edition in students with Intellectual Developmental Disorder

Document Type : Research Paper

Authors

1 phd Department of Exceptional Children Psychology, Faculty of Humanities and Social Sciences, Science & Research Branch, Islamic Azad University. Tehran.Iran

2 Ph.D. in Psychology and Exceptional Children Education, Assistant Professor, Islamic Azad University, Islamshahr Branch

3 Faculty of Psychology and Educational Sciences, University of Tehran, Tehran, Iran

Abstract

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
identification purposes and research.

Keywords


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Volume 9, Issue 3
December 2018
Pages 161-179
  • Receive Date: 31 December 2018
  • Accept Date: 31 December 2018
  • First Publish Date: 31 December 2018
  • Publish Date: 23 September 2018