The aim of this study is to develop a scale determining secondary school stu- dent’s attitude towards biology. For this aim, at first, totally 92 scale items were prepared by reviewing relevant literature. 88 items in this scale were a five-point Likert type scale. 4 of 92 items consisted of demographic variables. The scale was applied to a sample of 109 students randomly selected from two secondary schools in Erzurum. At the end of this application, SPSS 12.0 Statistical Program was used to analyze the data. Reliability analyses were counted through item total and item discriminating power. The construct validity of this scale was verified by factor analysis. Based on this factor analysis, five factor were identified. Cronbach Alpha internal consistency coefficient for whole test was found to be 0.917. All these find- ings showed that it is a valid and reliable tool in measuring of secondary school stu- dents’ attitudes toward biology.
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