In addition to IQ subtests;

�The (Watson-Glaser Critical Thinking Appraisal) requires the application of some important abilities in critical thinking, including inference, deduction, interpretation, and evaluation.�

I doubt this is an appropriate test for most six year olds. My son (12 at the time) took it as part of a battery of tests for a high math ability enrichment program. The other tests were more math specific. I also read that it is given by some employers as part of the evaluation process for new hires.