This study aims to develop a problem posing self-efficacy scale for middle school students. In this direction, a personal information form and the draft scale, consisting of 33 items, was applied to 371 participants of seventh and eighth graders. The obtained data were subjected to Cronbach-alpha reliability test, item-total correlation, explanatory and confirmatory factor analysis. The factor analysis showed that the scale is composed of 5 factors. The percentage of variance explained by the factors was calculated as 45.64%. The fit indices obtained as a result of confirmatory factor analysis showed that there was agreement between the model and the data and that the proposed model showed good or acceptable adaptation. Cronbach alpha internal consistency reliability coefficient of the scale was 0.85. As a result of analyzes, a 5-score Likert type problem-solving self-efficacy scale consisting of 24-items was developed. According to the findings, it is determined that the self-efficacy scale is a valid and a reliable assessment tool.
Key words: Problem posing, self-efficacy, scale development
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