Motivations or needs are not static; on the contrary, they are persistent and dynamic forces which cause particular behavior. When it arises, the need break the balance of the body and causes a State of stress, dissatisfaction, discomfort and imbalance that leads the individual to develop a behavior or action capable of download tension or rid the discomfort or imbalance. If the behavior is effective, the individual will find the satisfaction of the need and, consequently, the discharge of tension caused by her. Met the need, the Agency back to the previous equilibrium State and its natural form of adaptation to the environment. Motivation cycle can be summarized as follows. With the repetition of the cycle of motivation (reinforcement) and learning that there is derived, the behaviour or actions are made gradually but effective in satisfying certain needs. A satisfied need is not motivating behavior, since it does not cause tension, discomfort or imbalance.
Consequently, a person who is not hungry is not motivated to find food to eat. (DAVIS, 1992)The need can be met, failed or compensated (transferred to another object). Motivation cycle, there is a State of inner balance (of the person) altered by a stimulus (internal) or incentive (external), which produces a necessity. Need leads to a State of tension which leads to a behavior or action which leads to the satisfaction of that need. Met this human organism returns to the previous internal balance. However, the need nor always satisfies. Many times, the tension caused by the emergence of the need is a barrier or an obstacle for his release. Not finding out normal, the voltage represada in the body, seeks an indirect output mechanism, either through social (aggressiveness, discontent, emotional stress, apathy, indifference, etc). Either through the Physiology (nervous tension, insomnia, cardiac effects or digestive etc) this is called frustration, since the voltage is not downloaded and remains in the body causing certain symptoms, psychological, physiological or social.