Translation of a scale measuring cognitive test anxiety (G-CTAS) and its psychometric examination among medical students in Germany

Aim of the study: Test anxiety expresses itself in a variety of physical and cognitive processes. Due to its influence on test performance, the cognitive component in particular can have a negative impact on those affected. A measuring instrument for this is not yet available in the German-speaking world but does exist in the form of the “Cognitive Test Anxiety Scale” (CTAS), among other languages, in English. The aim of this work was the creation and psychometric review of a German version of the scale (G-CTAS). Methods: A German translation of the scale was created using a forward-backward procedure. Statistical investigations were then carried out on a cohort of medical students, which included an item analysis with calculation of difficulty, variance and item discrimination as well as the determination of the scale’s internal consistency. The criterion validity was examined using test performance and gender-specific differences. Results: The final version contains 26 matching items with acceptable item parameters (mean values >1.46, <3.13; variances >0.48; part-whole-discrimination-indices >0.37). Cronbach's alpha was 0.92, the scale was therefore found to be a reliable measuring instrument. The scale validity could be confirmed by significant differences (p<0.01) between total values of female and male participants as well as significant correlations (p<0.001) between total values and test performance in the written and oral part of the first state examination. Conclusion: With G-CTAS a suitable measuring instrument for cognitive test anxiety within the German-speaking world is available, which can be used, among other things, for studies concerning the relationship between stress, exams and test anxiety among medical students.