So from my understanding, the Dunning-Kruger Effect paper doesn’t show the distribution of the perceived test scores nor the standard deviation, only an average, which rises with actual test score level.
If they showed the spread bar in each bin, you could form very different conclusions. Do low skilled people consistently estimate their score at around 60, or do they give effectively random results centred around 60?
Assuming the latter, it could mean that low skilled individuals are completely unable to evaluate their performance while higher skilled people are slightly better at it but still not very good, giving a slightly positive correlation which… is very distinct from what the DK effect implied.
If they showed the spread bar in each bin, you could form very different conclusions. Do low skilled people consistently estimate their score at around 60, or do they give effectively random results centred around 60?
Assuming the latter, it could mean that low skilled individuals are completely unable to evaluate their performance while higher skilled people are slightly better at it but still not very good, giving a slightly positive correlation which… is very distinct from what the DK effect implied.