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Unit 3-C (B): Twin Studies Mr. McCormick A.P. Psychology.

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Presentation on theme: "Unit 3-C (B): Twin Studies Mr. McCormick A.P. Psychology."— Presentation transcript:

1 Unit 3-C (B): Twin Studies Mr. McCormick A.P. Psychology

2 Do-Now (Discussion) Think about someone you know who was adopted as a child: Think about someone you know who was adopted as a child: In what ways are their personalities similar to their adoptive parent(s)? In what ways are they different? In what ways are their personalities similar to their adoptive parent(s)? In what ways are they different? In what ways are their personalities similar to their biological parent(s), if known? In what ways are their personalities similar to their biological parent(s), if known? What do you feel has a greater influence on one’s personality – one’s biological make-up or one’s familial environment? What do you feel has a greater influence on one’s personality – one’s biological make-up or one’s familial environment?

3 Identical Vs. Fraternal Twins Identical Twins: Identical Twins: Twins who develop from a single fertilized egg that splits in two, creating genetically identical organisms Twins who develop from a single fertilized egg that splits in two, creating genetically identical organisms Same sex only Same sex only Fraternal Twins: Fraternal Twins: Twins who develop from separate fertilized eggs Twins who develop from separate fertilized eggs Genetically no closer than brothers and sisters, but they share a fetal environment Genetically no closer than brothers and sisters, but they share a fetal environment Same or opposite sex Same or opposite sex

4 Identical Vs. Fraternal Twins

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6 Separated Twins Identical twins who have been separated since birth tend to share many cognitive, behavioral, and social similarities with one another (more so than fraternal twins). Identical twins who have been separated since birth tend to share many cognitive, behavioral, and social similarities with one another (more so than fraternal twins). Adopted children tend to share many cognitive, behavioral, and social similarities, with both their adoptive and biological parents; however, there tend to be stronger similarities with biological parents. Adopted children tend to share many cognitive, behavioral, and social similarities, with both their adoptive and biological parents; however, there tend to be stronger similarities with biological parents.

7 Genetics, Environment, and Personality: Twin Studies Assignment: Assignment: Read “Genetics, Environment, and Personality” Read “Genetics, Environment, and Personality” Answer Questions #1-3 Answer Questions #1-3

8 Review Differentiate between Identical Twins and Fraternal Twins in terms of the following: Differentiate between Identical Twins and Fraternal Twins in terms of the following: Prenatal Development Prenatal Development Genetic Make-up Genetic Make-up Physical Appearance Physical Appearance To what extent do you attribute Nature and Nurture to the following: To what extent do you attribute Nature and Nurture to the following: Physical Appearance Physical Appearance Personality Personality “Intelligence”/IQ “Intelligence”/IQ

9 Homework Research Study Response #3: “Are You a ‘Natural?’”(Pgs ) Research Study Response #3: “Are You a ‘Natural?’”(Pgs ) Chapter 4 Quiz: “Nature, Nurture, and Human Diversity” Chapter 4 Quiz: “Nature, Nurture, and Human Diversity” Unit 3 Test: “Biological Bases of Behavior” Unit 3 Test: “Biological Bases of Behavior” Chapter 6 Outline: “Sensation and Perception” Chapter 6 Outline: “Sensation and Perception” Unit 3 Project: “3-D Brain Model” Unit 3 Project: “3-D Brain Model”


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