Psychology is the study of the mind and mental processes, especially in relation to behavior.
Clinical psychology is concerned with diagnosing and treating disorders of the brain, emotional disturbances, and behavioural problems. Child psychology is the study of the mental and emotional development of children and is part of developmental psychology, the study of changes in behaviour that occur through the life span. Cognitive psychology deals with how the human mind receives and interprets impressions and ideas. Social psychology looks at how the actions of others influence the behavior of an individual.
Psychologists are experts in psychology and are usually categorised under a number of mental health professions such as clinical and counseling psychologists. Psychologists can only use talk therapy as treatment; you must see a psychiatrist or other medical doctor to be treated with medication.
Psychotherapy is treatment based on talking to another person who is objective, sympathetic and non-judgmental. Under these circumstances it is possible to talk about what are sometimes very painful issues or life challenges. By sharing these issues and learning more about them, it is possible to gain the strength and understanding to deal with them more effectively and gain ascendency over them.
A neuropsychologist is a psychologist who has completed special training in the neurobiological causes of brain disorders, and who specialises in diagnosing and treating these illnesses using a predominantly medical (as opposed to psychoanalytical) approach.