You can't demonstrate you collected results from anybody who was actually any good at maths, you just got a bunch of responses from people who thought they were good at maths.
Exactly. This study implies that the people who rated themselves excellent in math are actually worse at it than people who didn't rate themselves excellent.
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You can't demonstrate you collected results from anybody who was actually any good at maths, you just got a bunch of responses from people who thought they were good at maths.
Exactly. This study implies that the people who rated themselves excellent in math are actually worse at it than people who didn't rate themselves excellent.