- Genes influence most personality traits, roughly half of the variability among individuals is from genetic factors. The other half comes from differences in life experiences as well as other factors.
- Simply growing up in the same family does not mean that people and their personalities will be similar.
- It is believed that when siblings are similar it is due to their genetic similarities.
- Extroversion and introversion arises from individual differences in the brain.
"Research aimed at understanding how the structure and activity of our brains can contribute to the formation of our personality traits is still in early stages... The growing area of research is promising and many believe it will help us better understand how we each develop into the unique people we are."
References:
Gilbert, Daniel T., Daniel M. Wegner, and Matthew K. Nock. "Personality."Psychology. By Daniel L. Schacter. Third ed. N.p.: Worth, n.d. 471-503. Print.
Gilbert, Daniel T., Daniel M. Wegner, and Matthew K. Nock. "Personality."Psychology. By Daniel L. Schacter. Third ed. N.p.: Worth, n.d. 471-503. Print.