ASSESSING THE RELIABILITY AND VALIDITY CRITICAL THINKING QUESTIONNAIRE (CThQ)
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Abstract
Critical thinking is a logical, rational, and reflective process, making it essential to develop an effective measurement tool. This study has three objectives: (1) to translate the Critical Thinking Questionnaire (CThQ) from English to Indonesian; (2) to ensure the reliability and validity of the Indonesian version of the CThQ as a measure of critical thinking ability; (3) to adjust several items of the measurement tool to better align with specific measurement needs. The Indonesian version of CThQ consists of 25 items to assess a person's ability to evaluate information's validity. The research was conducted using a quantitative method through a questionnaire administered to 416 students. The instrument adaptation process was carried out in three stages: translation using the forward-backward translation technique, expert validation for item adjustment, and empirical testing. The analysis results showed that the Indonesian version of the CThQ has good internal consistency (α = 0.875). The validity of the instrument was analyzed by comparing the r-calculated value obtained from the Pearson correlation with the r-table value at a significance level of 0.05. The results of the validity analysis show that the 25 items in CThQ have r-calculated values greater than r-table (rtable = 0.096), indicating that the items are valid. These findings indicate that the adapted Indonesian version of the CThQ is a valid and reliable instrument for measuring critical thinking skills. From the analysis conducted, the CThQ demonstrated satisfactory results in reliability and validity, making it a highly suitable instrument for use in educational contexts.
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