en Occupational Health Original Article <div style="text-align: justify;"><span style="font-size:10pt"><span style="line-height:200%"><span courier="" new="" style="font-family:"><span style="color:black"><b><span arial="" style="font-family:">Background: </span></b><span arial="" style="font-family:">Teaching is one of the most stressful jobs. This research aims to evaluate the validity of the scale for measuring occupational stress among Iranian teachers.</span></span></span></span></span><br> <span style="font-size:10pt"><span style="line-height:200%"><span courier="" new="" style="font-family:"><span style="color:black"><b><span arial="" style="font-family:">Materials and Methods:</span></b>&nbsp; <span arial="" style="font-family:">This cross-sectional survey was conducted from December 2020 to January 2021 using a quantitative approach and the psychometric validation research method. The research sample consisted of specialists (n = 16) and teachers assisting in the initial (n = 35) and main (n = 365) implementation phases of the questionnaire for validation of Rosenberg&#39;s teacher stress scale (2010). The sample of specialists was selected by the purposive sampling method, and the sample of teachers was selected by the simple random method. Exploratory Factor Analysis (EFA) with SPSS was utilized to classify dimensions of occupational stress. In addition, a first- and second-order confirmatory factor analysis with PLS was performed to evaluate construct validity (P < 0.05). </span></span></span></span></span><br> <span style="font-size:10pt"><span style="line-height:200%"><span courier="" new="" style="font-family:"><span style="color:black"><b><span arial="" style="font-family:">Results:</span></b> <span arial="" style="font-family:">Content validity assessment confirmed 36 items. The reliability of the questionnaire, 35 out of 36 items, was confirmed. The EFA calculation of the items showed that the measures could be classified into 11 factors, and the factor load of all items was above 0.3, being valid. In addition, the calculation of the second-order Confirmatory Factor Analysis (CFA) showed that the 11 factors would explain the construct of occupational stress (P < 0.05). Furthermore, the goodness-of-fit index results showed high fitness of the model.</span></span></span></span></span><br> <span style="font-size:10pt"><span style="line-height:200%"><span courier="" new="" style="font-family:"><span style="color:black"><b><span arial="" style="font-family:">Conclusion:</span></b><span arial="" style="font-family:"> The questionnaire provided an effective instrument for measuring occupational stress and filling the gap in the absence of a comprehensive scale.</span></span></span></span></span><br> &nbsp;</div> Occupational Stress,Teacher,Teaching,Scale,Validation, 281 290 http://johe.rums.ac.ir/browse.php?a_code=A-10-280-2&slc_lang=en&sid=1 Esmail Abdali EAbdali@yahoo.com 5059263169 22400319475328460011439 No Ph.D Student in Educational Administration, Dept. of Educational Administration, Tabriz Branch, Islamic Azad University, Tabriz, Iran. Tabriz Branch, Islamic Azad University Behnam Talebi btalebi1972@gmail.com 5197856971 22400319475328460011440 Yes Assistant Prof., Dept. of Educational Administration, Tabriz Branch, Islamic Azad University, Tabriz, Iran. Islamic Azad University Asadollah Khadivi AssadollahKhadivi@gmail.com 5079793971 22400319475328460011441 No Assistant Prof., Dept. of Educational Administration, Tabriz Branch, Farhangian University, Tabriz, Iran. Farhangian University