Student's Psychometric Properties of a Scale Measuring Attitudes toward People with Disabilities

People with disabilities are increasing in the world; so recognizing attitude of the society about disability is necessary. Since this attitude is important, having appropriate tools for its measuring is essential. This study was aimed to investigate psychometric properties of a measuring scale of attitudes toward people with disabilities.
This is a non-experimental study, in which scale of attitudes toward people with disabilities (ATDP) was translated, equivalent and normalized. Data collection tool was ATDP Scale. English version of the questionnaire in two stages was translated in Persian by three translators whose native language was Persian and they had experience and proficiency in the English translation, then translated back. Scale reliability was investigated test- the test within three weeks. ICC and SEM indices were used for evaluating the relative and absolute repeatability and Cronbach's alpha was used for coefficient to evaluate reproducibility of scale scores. For content validity, qualitative method of content validity was used. The translated text was sent to ten experts and their comments were taken.
The results showed that the translators were agreed in the overall quality of the translation (90%), in the same concept (93.3%), in the transparency (96.7%) and in the common language translator (96.7%). All scales of the questionnaire were showed good stability (Cronbach= 0.85, Icc= 0.75 and r= 0.70).
The study showed that the Persian version of the ATDP scale has reliability and validity for measuring attitudes toward people with disabilities in society.