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Cognitive Interviews on New Biology Reasoning Items: Inference, Yes, Test-Taking Strategies, No

Tue, April 21, 8:15 to 9:45am, Virtual Room

Abstract

We conducted cognitive interviews on new biology reasoning items, replicating a cognitive interview study with 'Form A' items on the same construct. Thirty-seven undergraduate biology students verbalized their thinking while answering the 15 'Form B' questions, which had shown good psychometric and DIF properties. Examinees' verbalizations were coded using an existing coding scheme. Of 41 codes, only 5 showed differences between questions answered correctly versus incorrectly. The targeted inferences were significantly different, providing strong validity support. One test-taking strategy (process of elimination) and one low-level strategy (search) also showed differences. On the whole, results strongly suggest that these new items do in fact tap reasoning with newly provided information, not reading or test-taking strategies, content or vocabulary knowledge.

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