People who underestimate their capabilities also bear costs, although, as already noted, these are more likely to take self-limiting rather than aversive forms. By failing to cultivate personal potentialities and constricting their activities, such persons cut themselves off from many rewarding experiences. Should they attempt tasks having evaluative significance, they create internal obstacles to effective performance by approaching them with unnerving self-doubts
Albert BanduraWe are more heavily invested in the theories of failure than we are in the theories of success.
Albert BanduraThe effects of outcome expectancies on performance motivation are partly governed by self-beliefs of efficacy
Albert Bandura