Hollis, H; Rachitskiy, M; Van der Leer, L; Elder, L; (2020) Validity and reliability testing of the International Critical Thinking Essay Test form A (ICTET-A). UCL Department of Information Studies: London, UK.

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Abstract

This study aimed to assess the validity of form A of the International Critical Thinking Essay test as a tool for measuring critical thinking. To this end, we assessed the test for inter-rater reliability, internal reliability, and criterion validity. A self-selecting sample of participants (N = 100) completed the ICTET-A and a comparison test (the Ennis Weir Critical Thinking Essay Test) in an online, correlational, cross-sectional study. We found the ICTET-A items to have moderate to good levels of inter-rater reliability, and overall excellent inter-rater consistency for total test scores. The test had good internal reliability. There was a strong correlation between scores on the ICTET-A and the comparison test. Factor analysis showed that scores on ICTET-items were best explained with one factor, suggesting the test measures a single construct. The ICTET-A can therefore be considered a valid measure of critical thinking. Additionally, we propose a short form of the test for use in conditions where time constraints are a critical concern.

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