Psychologist study the behavior of individuals from two stances brain function and the impact the environment has on the behavior. With this in mind, they employ scientific methodology thru the means of observation or experiments which is later analyzed. The American Psychological Association (APA) illustrates the various types of psychologist and their roles. Development psychologist studies the human behavior through ones lifespan. Health psychologist studies the effects on health and illness from a biological, psychological, and social standpoint. Rehabilitation psychologist assists individuals with disabilities to adapt to their living environment. With this being said, before the individual can achieve their desired goal the psychologist
