Personality is based on genetics and environmental factors. Your basic personality is developed by age 5, thus making parents and child-care providers important in the early years of life, but your personality does change as you age. You can speed up the change, but it isn’t easy and takes work.

Our personality influences the types of careers we choose, such as being people oriented like social workers and teachers or task oriented like accountants and computer programmers. Personality is a predictor of job performance.