1. Heredity and the Environment Key Terms: Heredity, Twin Studies

2. Nature or Nurture?  Rousseau  We are born with everything that makes us who we are  Noble savages to be corrupted by society  Locke  Babies are blank slates; no knowledge or skills  Experiences determine who we become

3. Victor: The Feral Child of Aveyron  Found around age 12  Could not walk upright or talk  Thought to be mentally unsound  Jean-Marc Itard thought otherwise

4. Nature AND Nurture? Mental Disease  If one twin is schizophrenic, the other is 3x more likely to become so  Not always going to happen Twin Jims  Identical twins separated at birth  Shared many things in common normally considered “nurture” traits  I.E. Drinking habits, vacationing spots, jobs

5. Twin Studies  Identical twins = identical DNA  Reveals importance of genes in acquiring certain traits  Twins separated at birth

6. Videos  Twins: Epigenetics Twins: Epigenetics  Twins: Is is All in the Genes? Twins: Is is All in the Genes?