What kinds of evidence do researchers draw on when considering the effects of nature and nurture on personality?

Personality is best described as what makes up a person, their traits and individual differences that make them unique. There has been much research undertaken as to what actually causes a personality to develop whether it is nature (genetically inherited) or by nurture (the environment) research has shown that it is a combination of both and this will be examined in this essay. Human society is complex and this presents researchers with difficulties in measurement …

…that seem to indicate that personality is developed through an interaction between genetics and the environment. Differing situations should be accounted for when comparing the results, to date it has been difficult to define what the exact ratio of heritability - environment is, research has shown heritability to be approximately 30%. References: Thomas, K The individual differences approach to personality, in Miell, D, Phoenix A and Thomas K (eds), Mapping Psychology 1 Milton Keynes, The Open University.