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Introduction: Paying attention to the quality of working life is one of the methods in supporting employees to obtain better function in a working environment. Therefore, a valid and reliable scale for measuring this concept is necessary. The aim of this study was to develop and measure the psychometrics properties of "Quality of Work Life Scale in Teachers of Students with Special Needs".

Methods: This was a study with exploratory design conducted in two parts: qualitative and quantitative. Samples included 12 teachers in the qualitative and 232 in the quantitative parts. The samples were selected by convenience method. Data was collected by semi-structured interview. Interviews were analyzed with qualitative content analysis approach. In the quantitative part, for measuring the validity, content validity index, face, construct and concurrent validity, and for the stability reliability of the scale, alpha coefficient and test-retest were used. Data was analyzed by SPSS.16.

Results: The "Quality of Work Life Scale in Teachers of Students with Special Needs" was developed with 53 items. Content and face were confirmed and construct validity showed 7 factors. Concurrent validity (r = 0.22), alpha coefficient (0.89) and test-retest for stability reliability of the scale (0.62-0.92) were confirmed.

Conclusions: The "Quality of Work Life Scale in Teachers of Students with Special Needs" was developed using 53 items and 7 factors, which were valid and reliable. The use of the scale for measuring quality of work life in teachers of students with special needs is suggested.

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Introduction: Role conflict occurs when an individual is required to perform multiple social roles and inconsistent behaviors. One of these types of conflicts is work-family conflict. Therefore, the present study was conducted with the aim of translating and psychometric the "Work-Family Conflict Scale". In the staff of the Ministry of Sports and Youth.
Methods: The present study is a methodological research. The research population was the staff of the Ministry of Sports and Youth, which was selected as a statistical sample using non-random and quota method and the number of samples required for factor analysis of 200 people. "Work-Family Conflict Scale" with 18 items and 6 subscales and 5-point Likert response method from very low to very high. First, the original version was translated into Persian, then the original translations were combined into a single translation. The final version translated from Persian to English and finally the translated version was reviewed, corrected and summarized. 
Face validity, content validity ratio, content validity index, construct validity (exploratory factor analysis method), convergent validity and divergent validity were measured. Reliability was determined by Cronbach's alpha coefficient and composite reliability. Data were analyzed using SPSS. 24 and SmartPLS 3.2.1.
Results: All scale expressions have an impact of more than 1.5 according to experts. The results of content validity ratio with the opinion of 15 experts were 0.59 and content validity index was 0.79-0.81. The results of Bartlett sphericity test showed a sufficient significant correlation between the questions (Chi-square = 2263.023, P <0.001). Also, the results obtained from Kaiser criterion showed that the factor loads for all 6 factors were greater than 0.40 Which explains 76.791% of the total variance. Confirmatory factor analysis showed that the convergent validity indices in the six dimensions of the studied scale are more than 0.5. Also, divergent validity showed that the mean extracted variance of each of the six dimensions is greater than its highest correlation with other constructs of the studied scale. The results of Cronbach's alpha coefficients and composite reliability were more than 0.70 and 0.80, respectively.
Conclusions: “Work-Family Conflict Scale" can be used as a suitable instrument for assessing work-family conflict in the community of sports staff, as in the original version. Therefore, the use of this scale to measure this concept is recommended for sports staff.