Psychosocial Development (Psychosocial Development Model) 8 ridiculous to say the following. The median life span of humans From birth to about the age of 80 years is 8 range by changing the way the body and brain to suffer with problems is normal. And may occur in the development. It was like learning. The known problems And crisis in various ranges. Faced with the failure in one step. Will affect the development of that person in the next step, such as ineffective in the early developmental stage. Will affect the behavior that deviates from the normal group. Examples such as learning and social behavior of individuals during early childhood have problems. Resulting in behavioral problems. During adolescence And the problems of life during adulthood as well.