Abstract
Based on meta-analytic findings of a moderate negative correlation between test anxiety and test performance some researchers hypothesized that trait and/or state test anxiety may induce measurement bias. Two competing models have been advanced to account for the observed test anxiety-test performance relationship: the deficit hypothesis and the interference hypothesis. The interference hypothesis predicts that trait- and/or state test anxiety induces measurement bias. This effect has been hypothesized to be the most pronounced in items of intermediate difficulty. The deficit hypothesis, on the other hand, claims that test anxiety and test performance are correlated because less competent test-takers experience higher levels of state test anxiety in the assessment process. However, test anxiety is not assumed to have a causal effect on test performance. We tested these competing claims by means of item response theory and structural equation modeling. A total of N=411 respondents first completed a measure of trait test anxiety. Afterwards respondents were administered four cognitive ability tests. Upon completing the instruction and the first three items of each test respondents filled a pre-test state test anxiety questionnaire. The same state test anxiety questionnaire was also administered after all items of a subtest had been completed. In line with the deficit hypothesis the results indicated measurement invariance across different levels of state- and trait test anxiety. Furthermore, structural equation modeling revealed that that state/trait test anxiety is most closely related to psychometric g. Most interestingly state test anxiety components specific to the post-test measurement occasion were also related to cognitive ability while state test anxiety components specific to the pre-test measurement occasion were not systematically related to cognitive ability. The present finding is therefore most consistent with a deficit account to the test anxiety-test performance relationship.
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