The study didn't look at grades or test scores, relying instead on students' own rating of their performance from "excellent" to "below average." Sharif said other studies have shown that students generally inflate their actual school performance when asked.If they just would have asked students to estimate their GPA, they would have gotten a much more accurate sampling. Anyhow, the study is a perfect example of a joint effect fallacy, nothing more.
But since both good and bad students overrate their performance, she said, self-reporting is reliable.
Oct 2, 2006
TV rots your brain
A scientific study--perhaps the lamest of its kind--"proves" it.