Although techniques for gathering information on students’ CTS can come in a variety of forms, the most objective, standardized measures, however, are multiple-choice tests (e.g. Watson-Glaser Critical Thinking Appraisal, Cornell Critical Thinking Test, California Critical Thinking Skills Test, and the College Assessment of Academic Proficiency tests).

I think the method of testing deserves emphasis. I'm uncertain how CTS multiple-choice test performance would impact instrumental rationality. Relevant evidence would be appreciated.