There are many theories about what motivates people. In actuality, you are motivated by both internal and external factors, as there is always a mixture of reasons why you do, achieve, behave, learn and react. Personality and self-concept often determine whether or not you will be intrinsically or extrinsically motivated. If you understand the distinction between intrinsic and extrinsic motivational factors, you have a greater probability of motivating yourself or others. Every behavior has a underlying cause, and understanding the cause of behavior and motivating factors is key to changing or improving outcomes.