According to Thomas Schlosser, David Dunning and others, Dunning and Krujc report, in a series of experiments, that poor performers on a logic test seem unaware that they performed poorly. They hypothesize that people who do not perform well also do not judge their own and the performance of others accurately.
In a logic test administered to volunteers over the Internet, the lowest scorers overestimated their performance, reporting, on average, that they had earned 7 out of 10 items right instead of their actual score of 0.
A related set of experiments attempts to explain why top performers underestimate their scores.
These scientists suggest that teaching poor performers to solve logic problems leads to a reduction in errors of estimates of their performance, but other experiences do not account for improved scores.