Psychopathology%20and%20%20Behavioral%20Genetics

Psychopathology%20and%20%20Behavioral%20Genetics -...

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Unformatted text preview: Psychopathology and Behavioral Genetics Behavioral Review Review • What makes something abnormal? – Abnormal behavior is defined as: • Behavioral, emotional, or cognitive dysfunctions Behavioral, dysfunctions • That are unexpected in their cultural context That in • And associated with personal distress or And substantial impairment in functioning impairment Causes of Psychopathology Psychopathology One-Dimensional: Traces origins of behavior One-Dimensional: to a single cause. to Multi-Dimensional: Behavior results from Multi-Dimensional: multiple influences multiple Which model is the right model? Dimensions that Influence Dimensions Behavior • Behavioral Influence: Reactions based in learning Behavioral Reactions theory (classical or operant condoning) theory • Emotional Influences: Reactions based on internal Reactions motivations and affective triggers motivations • Socio-Cultural Influences: Based on reactions of individuals or social groups integral to our lives individuals • Developmental Influences: Reactions based on our age and time of certain inputs in our lives. age • Biological Influence: Reactions based purely on Reactions physiological or genetic predispositions physiological Behavioral Genetics Behavioral Behavioral genetics (BG) is a type of research methodology used to assess the influence of genetics/ environment. environment. Methods for examining heritability Methods • Adoption studies – Assess both biological and environmental influences • Family studies – Risk of passing disorder down – Ex. Schizophrenia • Twin studies – Both biological and environmental influences • Monozygotic (MZA vs MZT) vs. Dizygotic (DZA vs DZT) – A= apart; T= together A= Nature Vs. Nurture Nature • What is it? • Which side are you on? Models of Genetic Models Contribution 1) Diathesis-Stress Model 2) Reciprocal Gene-Environment 2) Model Model Diathesis-Stress Model Diathesis-Stress • We inherit tendencies to express certain We traits & behaviors which may be activated under certain activated conditions (STRESS) 1) Diathesis-Stress Model 1) • Determinant Genetics: When genetic When instructions produce absolute result instructions – Physiological characteristics & processes • Predisposition Genetics: When genes produce When greater likelihood but not definite outcome greater – Increase organism’s vulnerability for expressing a Increase trait trait 1) Diathesis-Stress Model 1) Vulnerability Biological Psychological Stressors Biological Psychological Social Abnormal Behavior / Psychological Disorder 2) Reciprocal Gene-Environment 2) Model • Genetic makeup increases probability Genetic that we experience certain stressful life events events Individual deliberately seeks out (nichepicks) environments that best suit their picks) hereditary traits hereditary • Reciprocal Gene-Environment Model Model Vulnerability Biological Psychological Stressors Biological Psychological Social Abnormal Behavior / Psychological Disorder Genetic Contributions to Psychopathology Psychopathology Vulnerability Biological Psychological Stressors Biological Psychological Social Equifinality Idea that different routes can lead to the same end Normal or Abnormal Development / Psychology ...
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This note was uploaded on 02/14/2011 for the course PSYCH 350 taught by Professor Conger during the Spring '10 term at Purdue.

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