investigation of content and face validity and reliability of sociocultural attitude towards appearance questionnaire-3 (sataq-3) among female adolescents

objective: this study aimed to determine the psychometric properties of sociocultural attitude towards appearance questionnaire in female adolescents. method: this was a methodological study. the english version of the questionnaire was translated into persian, using forward-backward method. then the face validity, content validity and reliability were checked. to ensure face validity, the questionnaire was given to 25 female adolescents, a psychologist and three nurses, who were required to evaluate the items with respect to problems, ambiguity, relativity, proper terms and grammar, and understandability. for content validity, 15 experts in psychology and nursing, who met the inclusion criteria, were required. they were asked to assess the qualitative of content validity. to determine the quantitative content validity, content validity index and content validity ratio were calculated. at the end, internal consistency of the items was assessed, using cronbach’s alpha method. results: according to the expert judgments, content validity ratio was 0.81 and content validity index was 0.91. besides, the reliability of the questionnaire was confirmed with cronbach’s alpha = 0.91, and physical and developmental areas showed the highest reliability indices. conclusion : the aforementioned questionnaire could be used in researches to assess female adolescents’ self-concept. this can be a stepping-stone towards identification of problems and improvement of adolescents’ body image.