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Chapter 2

Study Guide of Chapter 2 for PSYB32

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University of Toronto Scarborough
Konstantine Zakzanis

Chapter 2 Current Paradigms and the Role of Cultural Factors Paradigm - The conceptual framework or approach within which a scientist works. - its a set of basic assumption that outline the particular universe of scientific inquiry - Specify what problem scientists will investigate and how they will go about the investigation. - There are five paradigms: 1) Biological Paradigm - Perspective that mental disorders are caused by aberrant biological processes that is disrupted or not functioning normally. - Has three areas of research within this paradigm a) Behaviour Genetics - The study of individual differences in behaviour that are attributable in part to difference in genetic makeup. - The phenotype changes over time and is viewed as the product of an interaction between the genotype and the environment. - Various clinical symptoms are disorders of the phenotype, not genotype (since genotype is fixed at birth). - The study of behaviour genetics has relied on four basic methods to uncover whether a predisposition for psychopathology is inherited: comparison of member of a family, comparison of twins, the investigation of adoptees, and linkage analysis - In the family method, a genetic predisposition happens around family members because the average number of genes shared by two blood relative is known. - The twin method- if monozygotic- twins have 100% idental genes, if dizygotic- twins have 50% identical genes. - Concordance rate is higher in MZ twins than in DZ twins, and thus most heritable in MZ than DZ. - The equal environment assumption is that the environmental factors that are partial causes of concordance are equally influential in MZ and DZ pairs. - Adoptees method studies children who were adopted and reared apart from their parents with abnormal disorders. b) Molecular Genetics - tries to specify the particular gene or genes and the precise function of these - genetic polymorphism- refers to the variability among members of a species where it involved differences in the DNA sequence that can manifest in very different forms among members in the same habitat. - Linkage Analysis- is a method in molecular genetics that is used to study people. www.notesolution.com They collect diagnostic information and blood samples from affected individuals and their relative and use the blood samples to study the inheritance pattern of characteristics who genetics are fully understood, referred to as genetic markers c) Biochemistry of Nervous System - neuron (nerve cell) made up of four major parts; 1) the cell body, 2) Several dendrites, 3) one or more axons, 4) terminal button located on many end braches of the axon. - How a nerve impulse is sent-PAGE 36-37 -Neurotransmitters-chemical substances that allow a nerve impulse to cross the synapse (the space between the terminal ending of the sending axon and the cell membrane of the receiving neuron) - Nor epinephrine-neurotransmitter involved in anxiety disorders - Serotonin and dopamine are neurotransmitter of the brain. Involved in depression (serotonin) and schizophrenia (dopamine). a given disorder maybe be caused by either too much or too little of a particular neurotransmitter. ** Refer to pages 37-38 for structure and function of Human Brain** - In 1985, psychoactive drugs were introduced in the US. Tranquilizers were effective in reducing the tension associated with some anxiety disorders Antidepressants such as prozac to treat depression Antipsychotic drugs used for treating schizophrenia Stimulants such as Ritalin, employed in treating attention deficit hyperactivity disorder. Reductionism- refers to the view that whatever is being studied can and should be reduced to its most basic elements or constituents. reducing complex mental and emotional responses to simple biology. 2) Psychoanalytic Paradigm - Originally developed by Sigmund Freud - The central assumption is that psychopathology results from unconscious conflicts in the individual. - Freud divided the mind into three principle parts: the Id- is present at birth and is the part of the mind that accounts for all the energy needed to run the psych - comprises basic urges for food, water, elimination, warmth, affection and sex - pleasure principle, and seeks immediate gratification - Ids energy is all biological, but as infant grows, the energy, now called LIBIDO, concerted into psychic energy, all of it UNCONSCIOUS www.notesolution.com- another means of gratification is primary process thinking-generating images of what is desired The Ego- Primarily conscious and begins to develop from the id during the second 6months of live. - Secondary process thinking- the ego realizes that operating on the pleasure principle at all time is not the most effective way of maintaining life. - Operates on the reality principle as it mediates the demands of reality (superego) and the immediate gratification desired by the id. The Superego- operates roughly as the conscience and develops throughout childhood. - knows what is and what is no acceptable. - The apparently powerful role played by factors of which patients seem unaware led Freud to postulate that much of human behaviour is determined by forces inaccessible to awareness. - As elaborated by Anna Freud, the discomfort experienced by the anxious ego can be reduced in several ways by removing or avoiding the danger in the external world or by dealing with it in a rational way. - Defense Mechanism is a strategy, unconsciously used, to protect the ego from anxiety. Repression- which pushes unacceptable thoughts and imp
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