As a useful base for scale development, self-efficacy construct can be used in measuring competency and self-perception of individuals in their social behavior and academic achievements. The aim of this study was to develop a self-efficacy scale with two subscales of writing and social self-efficacy. To this effect, 261 high school students’ responses were used and resulted in development and validation of a 25-item self-efficacy scale. The presented two-factor model was supported with a principal factor analysis with high alpha reliabilities. It was also checked for model fit through conducting confirmatory factor analysis and was approved. Moreover, the developed scale was tested for presence of differential item functioning (DIF). The results presented confirmation for reliability and construct validity for the proposed scale and no DIF was detected. Further implications of the developed self-efficacy scale along with the limitations for this research are discussed in the concludi.....

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As a useful base for scale development, self-efficacy construct can be used in measuring competency and self-perception of individuals in their social behavior and academic achievements. The aim of this study was to develop a self-efficacy scale with two subscales of writing and social self-efficacy. To this effect, 261 high school students_ responses were used and resulted in development and validation of a 25-item self-efficacy scale. The presented two-factor model was supported with a principal factor analysis with high alpha reliabilities. It was also checked for model fit through conducting confirmatory factor analysis and was approved. Moreover, the developed scale was tested for presence of differential item functioning (DIF). The results presented confirmation for reliability and construct validity for the proposed scale and no DIF was detected. Further implications of the developed self-efficacy scale along with the limitations for this research are discussed in the concluding.....

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