Nature vs Nurture Studies

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One of the oldest controversy in psychology is nature vs. nurture. The whole debate boils down to genetic inheritance or environmental factors when it comes to human development. Philosopher Plato believed that certain behaviors are inborn or in others words occur naturally regardless of environmental factors. Then there are other philosopher such as John Locke who believe that the mind begins as a blank slate. So everything we come in contact with helps shape who we are. As for today, most expects now believe that behavior and personality are influenced by both nature and nurture. Some examples of gene inheritance are the color of your eyes, straight or curly hair, the pigment in your skin and certain inherited diseases. Not all people with blond hair are the same person and not all people in a family have the same color hair or eyes. An example of environmental factor that affects who you are is how you were brought up by your parents. Another example of environmental factor that helps influence behavior is the way you speak, you learn tone, speak, and sound from the people around you as a child. (Knowlton, 2005)
Studies.
The first study I found on Nature vs. Nurture was the Swedish Twin study of child and adolescent development otherwise known as TCHAD. It was a longitudinal study about how genes and environment can contribute to development of health and behaviors. This study was one of the largest twin studies ever conducted. It gathered data from 2960 people, 1480 set of twins and their parents over 16 years. The last time any data was collected on the subject were in 2005 when the children reached the of 20. The whole focus of this study was to look at externalizing symptoms such as criminal behavior, ADHD , an...

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...transmission from parent to their child has little effect on their later cognitive ability. (Plomin, Fulker, Corely & Defries, 1997)
Both of these studies the researchers used infants and children to help with prove or disapprove the biggest controversy in psychology today. The major similarities between these two studies are they both used children, both study followed the children over a 20 year period and both used intensive surveying and questioning to find out the results. The major differences of these two studies were the first study used identical twins and the second study just used children who were going to be adopted. Then in the first study it was trying to prove if aggressive behavior and mental disorders were caused by nature or nurture, the second study wanted to prove that children who were adopted tend to act more like their adoptive parents.

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