This concept is usually divided into two categories: internal and external. If a person has an internal locus of control, that person attributes success to his or her own efforts and abilities. A person who expects to succeed will be more motivated and more likely to learn. A person with an external locus of control, who attributes his or her success to luck or fate, will be less likely to make the effort needed to learn. People with an external locus of control are also more likely to experience anxiety since they believe that they are not in control of their lives. This is not to say, however, that an internal locus of control is "good" and an external locus of control is "bad." There are other variables to be considered, however, psychological research has found that people with a more internal locus of control seem to be better off, e.g. they tend to be more achievement oriented and get better paying jobs.
An updated version of Locus of Control is included in my new book, Help Me!. More information, including the table of contents, reviews and purchasing information is available on the Help Me! page.