Psychologists try to help people change problematic behavior, such as excess drinking. Psychologists are involved in the evaluation of treatments of mental health problems. Research might be conducted in a laboratory where things can be controlled, or it may take place in a real life setting, such as a hospital, school, or clinic. There are many types of psychologists. Developmental psychologists study how people behave and change throughout life.
Social psychology is concerned with the effects of social situations on human behavior.
Personality theorists study individual differences in how people behave. Neuropsychologists are concerned with the biological bases of behavior. Cognitive psychologists investigate memory, thought, problem solving, and the psychological aspects of learning. Clinical psychologists study ways to help individuals, couples, families and groups change problemmatic behavior. Industrial psychologists study the effects of the physical and social aspects of people's work environments on productivity and business.