4-16-Psychopathology1 - Psychopathology I Intelligence II...

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1 Psychopathology I Intelligence II • Reliability & Validity of Intelligence Testing • Extremes of Intelligence • Approaches to Intelligence Intelligence: Nature or Nurture? Heritability of IQ • Can genetic variation explain variation in IQ scores? • Research strategies: Twin studies: compare IQ scores in monozygotic (MZ) and dizygotic (DZ) twins Adoption studies: compare similarity of IQ scores of adopted children with adopted family and with biological family
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2 Heritability of IQ Heritability Ratio (H) – an estimate of the proportion of trait variability in a population that is determined by variations in genetic inheritance • Estimates of H fall between 0.4 and 0.7 • H=0.5 is most often quoted Caution : H is not applicable to individuals Environment and IQ • Adoption studies indicate that children reared together are more similar than those reared apart
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3 The Flynn Effect Flynn (1987, 1994, 1999) • IQ scores have been steadily rising for the last 70 years • Can’t be due to genetics! Reasons – Better nutrition, better schooling, more educated parents, etc. Interaction of Heredity & Environment • Heredity and environment both influence intelligence • It has been proposed that heredity sets certain limits on intelligence, and the environment determines where in that range the individual falls Reaction range – the genetically determined limits on IQ (or other traits) Reaction Range • Environment may determine where children fall within their reaction range • Explains why low IQ children sometimes come from good environment and why high IQ children can come from poor environment
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4 Psychopathology I Defining Abnormal Behavior • Psychological Disorders • Anxiety Disorders • Somatoform Disorders • Dissociative Disorders • Mood Disorders • Schizophrenic Disorders • Personality Disorders Psychopathology
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This note was uploaded on 05/23/2011 for the course PSYCHOLOGY 1101 taught by Professor Parks,nate during the Spring '08 term at Georgia Institute of Technology.

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4-16-Psychopathology1 - Psychopathology I Intelligence II...

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