PSY 1102 Lecture Notes - Lecture 4: Relational Aggression, Antisocial Personality Disorder, Amygdala

• School: University of Ottawa
• Department: Psychology
• Course: PSY 1102
• Professor: Christine Boisvert

Document Summary

Chapter 4 - nature, nurture, and human diversity. 4. 1 behaviour genetics: predicting individual differences behaviour geneticists: studies our differences and weight the effects and inter- play of heredity and environment. Thus our genetically influenced traits help ex- plain our shared human nature and human diversity. Identical twins: develop from a single (monozygotic) fertilized egg that splits into two. But they may not always have the same number of genes (this explains why one twin may be more at risk for a illness). Most identical twins share a placenta, but sometimes they may be in two separate ones. Fraternal twins: develop from separate (dizygotic) fertilized eggs. Genetically no more similar than ordinary brothers and sisters. studies found that in both outgoingness and emotional instability, identical twins are much more similar than fraternal twins. Separated twins compared to identical twins that stayed together, separated identical twins had some- what less identical personalities.