July 27, 2010
Topic 1. Indicate, describe and discuss the major theories and principles in abnormal psychology The Biological approach believes that abnormal behavior is caused by structural damage to the brain, biochemical imbalances, and genetic abnormalities. Research proves that certain characteristics of a person, such as a chemical imbalance in the brain, can be passed on from parent to child. These studies show patterns of abnormal behaviors from generation to generation. Other research provides proof that some individuals have abnormal behaviors because of defects in the brain or nervous system. The defects of the brain and nervous system can range from a lack or abundance of a certain chemical (such as serotonin) or damage done to the brain or nervous system from an illness, accident or other disorder. The brain requires many chemicals to work efficiently and effectively. When there is too much or too little of a certain neurotransmitter in the synapse that will cause certain types of psychopathology. Freud believed that personality develops in psychosexual stages; in each stage a part of the body becomes the child's main source of pleasure. Failure to resolve conflicts at any stage can cause fixation, an unconscious preoccupation with the pleasure area associated with that stage. Personality characteristics are a reflection of each person's fixation. The oral stage occurs during the first year of life because the mouth is the center of pleasure. The anal stage occurs during the second year when toilet training begins. The phallic stage emerges at three and lasts until age five . The boy experiences the Oedipus complex; he sexually desires his mother and wants to kill his father out of jealousy. The girl develops penis envy and begins to hate her mother for not providing a penis. After age five, the latency period ensues, during which sexual impulses lie dormant and the child turns away from anything sexually related. During