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Abnormal psychology 

Abnormal psychology is the scientific study of psychological disorders. These disorders affect the way people feel, think, speak, and behave. The field of abnormal psychology may be called psychopathology. 

Standards of normal and abnormal behaviour differ from society to society and change as social conditions and customs change. For example, the practice of severely beating children to discipline them was considered normal behaviour for many centuries. Today, many people consider such behaviour abnormal and cruel. 

Studies in abnormal psychology are conducted mainly by clinical psychologists, psychiatrists, and social workers. These experts collect data by such means as personality and intelligence tests, experiments, and case studies. One kind of case study, an idiographic study, describes the behaviour and thought patterns of one person. Another type, called a nomothetic study, examines the behaviour and thought patterns common to many people who suffer the same disorder. 

Theories of abnormal psychology describe mental illnesses, suggest possible causes of these illnesses, and propose certain methods of treating them. These theories can be divided into four main groups or schools: (1) biophysical, (2) intrapsychic, (3) existential, and (4) behavioural. 

Biophysical theories emphasize the importance of underlying physical causes of psychological disturbances. Such disturbances include two main groups: (1) those related to a medical condition, such as a disease or injury, and (2) those related to the use of a drug or medication. In these disorders, the condition, drug, or medication is believed to cause mental problems by affecting the brain or other parts of the nervous system. Biophysical theorists think such factors also underlie mental disturbances whose causes have not yet been identified. They believe many disturbances result from inherited physical defects. 

Biophysical therapists treat mental disorders mainly with tranquillizers, antidepressants, sleeping pills, and other drugs. In a few cases, they use electric shock or surgery on the brain or other parts of the nervous system. 

Intrapsychic theories focus on the emotional basis of abnormal behaviour. Intrapsychic theorists believe that conflicts in early childhood cause people to worry or have other unpleasant feelings throughout life. 

Psychologists use the term neurotic to describe people who sometimes behave abnormally but can usually cope with everyday problems. Individuals who lose track of reality are called psychotic. Some psychotics believe in very unrealistic ideas called delusions. They may also think perceptions such as "hearing voices" or "seeing visions," called hallucinations, are real. 

A treatment called psychoanalysis is often used to help neurotics and psychotics understand and resolve their conflicts and anxieties. During psychoanalysis, the patient talks to the therapist, who is called an analyst. In one technique, called free association, the patient talks to the analyst about whatever thoughts, images, or feelings come to mind. 

Existential theories of abnormal behaviour stress the importance of current experiences and the person's view of himself or herself. Existential therapists try to help patients gain insight into their feelings, accept responsibility for their lives, and fulfil their potential. 

Behavioural theories emphasize the effects of learning on behaviour. Behaviourists use a learning process called conditioning to change abnormal behaviour. In this process, behaviourists treat disturbed people by teaching them acceptable behaviour patterns and reinforcing desired behaviour by rewards. 


Since ancient times, people have attempted to understand and treat mental disorders. Many early societies believed that demons caused abnormal behaviour. Later, people came to regard the mentally ill as dangerous people with insufficient self-control to be normal. Disturbed individuals were imprisoned or sent to dismal institutions called asylums. 

During the late 1700's, the idea that abnormal behaviour resulted from serious personal problems began to be investigated. People started treating the mentally ill more humanely. 

During the 1800's, people believed in possible physical reasons for different kinds of mental disorders. A German psychiatrist named Emil Kraepelin became famous for his Lehrbuch der Psychiatre (A Textbook of Psychiatry, 1883). This classified various illnesses according to their specific types of abnormal behaviours. 

In the late 1800's and early 1900's, Sigmund Freud, an Austrian doctor, developed theories about the effects of unconscious drives on behaviour. Freud and his followers laid the foundations for both the intrapsychic school of psychopathology and psychoanalysis. The Freudians became especially known for their use of free association to interpret dreams, analyse memories, and make people aware of their unconscious conflicts. 

Later in the 1900's, researchers proposed several other theories and treatments of abnormal psychology. These proposals centred on the relationship of psychological, physical, and social conditions in the individual and society.



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