Özet:

This study aimed to develop a valid and reliable scale which would identify factors affecting students’ achievement in science. Firstly, it was an item pool for Scale of Factors Affecting the Science Achievement (SFASA) by referring the students' opinions and utilizing related educational literature. Then the expert opinion was taken to determine the content validity of the scale. The revised scale by experts’ opinions was applied to 681 university students. Items that was smaller than their correlation value of .30 was removed from the scale after the item analysis. After exploratory factor analysis, comorbid items are removed from the scale. It has been shown that the final version of the scale is explaining 45 045% of total variance. The scale is consisting of 29 items in five subscales of students, teachers, material, learning environment and curriculum. Cronbach’s alpha reliability coefficient was calculated to be .865 for full scale. This scale is considered to be a reliable and valid instrument and to shed light on research done about Predictors of science achievement in the future.

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