en Health Health Original Research Original Research <p style="text-align: justify;"><strong>Background: </strong>In spite of the increased range of inactivity and obesity among Iranian adults, insufficient research has been done on environmental factors influencing physical activity. As a result adapting a subjective (self-report) measurement tool for assessment of physical environment in Iran is critical. Accordingly, in this study Neighborhood Environment Walkability Scale (NEWS) was adapted for Iran and also its reliability was evaluated.</p> <p style="text-align: justify;"><strong>&nbsp; Methods:</strong> This study was conducted using a systematic adaptation method consisting of 3 steps: translate-back translation procedures, revision by a multidisciplinary panel of local experts and a cognitive study. Then NEWS-Iran was completed among adults aged 18 to 65 years (N=19) with an interval of 15 days. Intra-Class Coefficient (ICC) was used to evaluate the reliability of the adapted questionnaire.</p> <p style="text-align: justify;"><strong>&nbsp; Results:</strong> NEWS-Iran is an adapted version of NEWS-A (abbreviated) and in the adaptation process five items were added from other versions of NEWS, two subscales were significantly modified for a shorter and more effective questionnaire, and five new items were added about climate factors and site-specific uses. NEWS-Iran showed almost perfect reliability (ICCs: more than 0.8) for all subscales, with items having moderate to almost perfect reliability scores (ICCs: 0.56-0.96).</p> <p style="text-align: justify;"><strong>&nbsp; Conclusion:</strong> This study introduced NEWS-Iran, which is a reliable version of NEWS for measuring environmental perceptions related to physical activity behavior adapted for Iran. It is the first adapted version of NEWS which demonstrates a systematic adaptation process used by earlier studies. It can be used for other developing countries with similar environmental, social and cultural context.</p> <p></p> Environment, Physical activity, Neighborhood Environment Walkability Scale, Psychometrics, Iran. 923 931 http://mjiri.iums.ac.ir/browse.php?a_code=A-10-1-1060&slc_lang=en&sid=1 Pantea Hakimian pantea.hakimian@gmail.com 200319475328460025958 200319475328460025958 Yes Department of Urban Design and Planning, Faculty of Architecture and Planning, Shahid Beheshti University, Tehran, Iran. Azadeh Lak azadeh_lak@yahoo.com 200319475328460025959 200319475328460025959 No Department of Urban Design and Planning, Faculty of Architecture and Planning, Shahid Beheshti University, Tehran, Iran.