You call it self-belief
People who rate themselves high here are the ones others most often rate lower. It is the classic place a self-report and a reputation part ways.
Kwan, V. S. Y., John, O. P., Kenny, D. A., Bond, M. H. & Robins, R. W. (2004). Reconceptualizing individual differences in self-enhancement bias. Psychological Review, 111(1).






