I think the key here is when your self-rating of competence differs from your actual competence.
If someone is bad at karate (low competence) but thinks they’re really good (high confidence), they’ll be in the bottom left area. This could go wrong for them if someone attacked them and they attacked back and totally messed up.
On the other side, if someone is good at karate (high competence) but doubts themself (low confidence), they’d be in the top right area. This could go wrong for them if someone attacked them and they assumed that they’re bad and didn’t bother to fight back, even if they could’ve defended themself successfully.
I think the key here is when your self-rating of competence differs from your actual competence.
If someone is bad at karate (low competence) but thinks they’re really good (high confidence), they’ll be in the bottom left area. This could go wrong for them if someone attacked them and they attacked back and totally messed up.
On the other side, if someone is good at karate (high competence) but doubts themself (low confidence), they’d be in the top right area. This could go wrong for them if someone attacked them and they assumed that they’re bad and didn’t bother to fight back, even if they could’ve defended themself successfully.