Answer: SELF-EFFICACY.
Albert Bandura born December 4, 1925 is a psychologist who has contributed to the field of education and to several fields of psychology, including social cognitive theory, therapy, personality psychology etc.
He is also the theoretical construct of the term SELF-EFFICACY.
He defined self efficacy as "how well one can execute courses of action required to deal with prospective situations".
This definition is in line with the question above which is the belief in one's ability to be successful in the performance of a given task.