Developing critical thinking test for adolescents: A validity and reliability study from the Czech Republic

This article presents a comprehensive validation study of a Critical Thinking Test (CTT) conducted among Czech adolescents in 2023. It offers valuable insights into the psychometric properties, correlations, and predictors associated with analytical, evaluative and inferential abilities of critical thinking. While there are tools available for measuring critical thinking, they tend to be lengthy and inaccessible in the Czech language. Our study seeks to address this gap by developing a concise and effective tool that students can complete within a single class period. Our study is based on a large sample of Czech adolescents in their first year of secondary school (N = 9,495), which allows us to apply Item Response Theory (IRT), which is the best method for validation. The results showed that the abbreviated 33-item version of the CTT is a reliable and valid instrument that measures three distinct abilities (analysis, evaluation, and inference) that are highly correlated. Limitations and implications for the use of the instrument are discussed.