CHEMISTRY SELF-CONCEPT OF HIGH SCHOOL STUDENTS INVESTIGATED BY THE PREPARATION AND VALIDATION OF A SCALE
O AUTOCONCEITO EM QUÍMICA DE ESTUDANTES DO ENSINO MÉDIO INVESTIGADO PELA ELABORAÇÃO E VALIDAÇÃO DE UMA ESCALA
DOI:
https://doi.org/10.1590/1983-21172021230109%20Keywords:
Self-concept scale in Chemistry, Instrument validation, Item Response Theory.Abstract
In this study, we present the process of building and validating a self-concept scale in Chemistry for Brazilian high school students and evaluating the sample's self-concept configuration. We built a psychometric model and a test that was applied to 203 students. The analysis was done using the item response theory and the classic test theory. The results indicated that the scale is valid and comprises three factors: performance, interest, and cognitive engagement. The analysis of the self-concept showed that there is no difference in endorsement concerning the factors. Also, through this analysis, we identified that only sex was shown to be a predictor; this occurred only for the performance facet.
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