Psychologists believe there isn't one “right” way to study the way people think or behave. For example, some psychologists might attribute a certain behavior to biological factors such as genetics while another psychologist might consider early childhood experiences to be a more likely explanation for the behavior. Because psychologists emphasize various points within psychology in their research & analysis of behavior, there are 5 different viewpoints in psychology are known as perspectives. Biological Perspective is the application of the principles of biology to the study of mental processes & behavior. Psychodynamic Perspective is an approach to psychology that studies the psychological forces underlying human behavior, feelings, emotions, & how they may relate to early childhood experience. Behavior Perspective focuses on observable, overt behaviors that are learned from the environment. Cognitive Perspective examines internal mental processes such as problem solving, memory, & language.Cognition refers to thinking & memory processes, & cognitive development refers to long-term changes in these processes. Humanistic Perspective focuses on maximum human potential & achievement.