Uh, doesn't any test that requires conscious engagement measure the desire of the test taker? One could say that the scale in a doctor's office showed results

Uh, doesn't any test that requires conscious engagement measure the desire of the test taker? One could say that the scale in a doctor's office showed results commensurate with the desire of the person being weighed if some people had no desire to step on and thus weighed 0 lbs.