Reliability of scale was calculated through three methods internal consistency using Cronbach’s alpha coefficient, test-retest and interrater methods. Overall, 403 children aged 1 to 42 months were recruited from health centers of Tehran, Iran during years of 2013- 2014 for developmental assessment in cognitive, communicative (receptive & expressive) and motor (fine & gross) domains. Content & face validity of translated scale was determined by experts’ opinions. Translation- back translation and cultural adaptation was done. Our aim was investigating the validity & reliability of this scale in Persian speaking children. Winter 2017 11(1):50-56.īayley Scales of infant & toddler development is a well-known diagnostic developmental assessment tool for children aged 1–42 months. A Psychometric Study of the Bayley Scales of Infant and Toddler Development in Persian Language Children. N, Soleimani F, Vameghi R, Sajedi F, Shahshahani S, Karimi H, Kraskian A, Shahrokhi A, Teymouri R, Gharib M.
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