the reliability of the social responsiveness scale2 in an iranian typically developing group of children

Objective: the social responsiveness scale-2 (srs-2) is a well-known screening instrument to assess autistic spectrum symptoms quantitatively. this study assessed the different types of reliability of the farsi translation of the scale. method: this scale was translated into farsi and back translated considering all aspects of methodology in translation. then, based on stratified sampling, 533 7-11-year-old students were randomly selected from the mainstream schools located in the central parts of tehran, the capital of iran. for all the students, srs-2 was completed by both the parents and teachers. to check retest reliability, the test was administered again for 15% of the total participants after a 2-4 week-period. cronbach’s alpha coefficient, split-half” and gottman” methods, and intra-class correlation coefficient (icc) were used. results: the mean total raw score was 48.47 (±23.63) and 53.17 (±27.33) in the sequence of the parents and teachers’ reports. the internal consistency (cronbach’s alpha; 0.86 and 0.89), test-retest reliability (icc; 0.72 and 0.83 for parents and teacher’ ratings, respectively), and interrater reliability (icc; 0.72) showed well-accepted measurement performance. conclusion: the findings indicated that the farsi srs-2 can be used as a reliable instrument to measure social responsiveness as autistic symptoms in iranian child population.