* Assumptions * Abnormal behavior has a physical cause * It is treated by the medical profession like a physical illness * * Causes * Brain damage * Phineas Gage was an American railroad construction foreman who survived an accident in which a large iron rod was driven completely through his head, destroying much of his brain's left frontal lobe and this caused his personality and behvaiour to change, he became reportedly unreliable, partial to swearing and often making inappropriate remarks. * Infection * Clive Wearing lost his memory due to encephalitis, which is from herpes-simplex (the cold sore virus). The virus lies dormant in most of the population, however with Clive the virus went to his brain rather than his mouth, causing the brain to swell and crush against the bone, causing him to lose all memory. * Neurotransmitters * Dopamine hypothesis says that schizophrenia may cause an increase in dopamine, although it could also be too many D2 receptors that cause schizophrenia * Genetics * Holland et al * They completed a study on Mz and Dz twins * It was found that if your Mz twin had anorexia there was a 56% chance of you having anorexia too, however if your dz twin had anorexia there was only a 5% chance. * This shows that there may be a link between genetics and anorexia, however if there was a definite link then the concordance rate for Mz twins with anorexia would be 100% * * Evaluation * + Scientific: It is based on evidence from controlled experiments using objective measurements * + Effective Drug Treatments: Drugs have been successful in dealing with the symptoms of abnormal behavior * - Diagnosis Leads to Labeling: People can behave in accordance with the label they have been given. The label of mentally ill can stigmatize them because people have negative impressions of mental illness * - Treats Symptoms Not The Causes: Doesn’t identify and deal with the causes of abnormality so the problem can continue * - Used as a Form Of Social Control: By diagnosing people as mentally ill they can be hospitalized and removed from society. Their behavior is controlled and they have no freedom of choice * - Ignores the Social Influences on Behaviour: Abnormal behavior can