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Mod_33_34_35_moodle - Geneticand EnvironmentalInfluences...

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1 Genetic and  Environmental Influences  on Intelligence Module 33
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2 Genetic and Environmental Influences  on Intelligence No other topic in psychology is so passionately followed  as the one that asks the question, “Is intelligence due to  genetics or the environment?”   
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3 Genetic Influences Studies of twins, family members and adopted children  together support the idea that there is a significant  _genetic contribution_ to intelligence.
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4 Adoption Studies Adopted children show a marginal correlation in verbal  ability to their  _adopted parents_ .
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5 Environmental Influences Studies of twins and adopted children also show: 1. _Fraternal Twins_ raised together tend to show  similarity in intelligence scores. 2. _Identical Twins_ raised apart are slightly less  similar on their intelligence scores.
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6 Early Intervention Effects _Early neglect_ from caregivers leads children to develop  a lack personal control over the environment and also  impoverishes    _their intelligence_ . Romanian orphans with minimal human interaction had delayed development.
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7 Schooling Effects _Schooling_  is an intervention that pays dividends,  reflected in intelligence scores. Increased schooling is  related to higher intelligence scores. To increase readiness for schoolwork Projects like  _Head Start_ facilitate leaning.
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8 Group Differences in intelligence Test  Scores Why do groups differ in intelligence? And how can we  make sense of these differences?
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9 Ethnic Similarities and Differences 1. Racial groups  _differ_  in their average  intelligence scores. 2. High-scoring people (and groups) are more  likely  _to attain high levels_ of education and  income. To discuss this issue we begin by two disturbing but  agreed upon facts:
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10 Racial (Group) Differences If we look at racial differences, on average intelligence,  white Americans score  _higher_  than black Americans  (Avery and others, 1994). European New Zealanders  score  _higher_  than native New Zealanders (Braden,  1994). White-Americans Black-Americans Average IQ = 100 Average IQ = 85 Hispanic Americans
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11 _Environmental Effects_ Differences in intelligence among these groups is largely  environmental, as if one environment was more fertile to  develop these abilities than another.  
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12 Reasons for Why Environment Affects  Intelligence 1. The races are remarkably alike genetically.  2. Race is a social category. 3.
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Mod_33_34_35_moodle - Geneticand EnvironmentalInfluences...

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