What is the definition of heritability and how is it measured? In relation to the personality trait of Neuroticism, discuss heritability estimates from two different methods.

1. What is the definition of heritability and how is it measured? In relation to the personality trait of Neuroticism, discuss heritability estimates from two different methods. 1000 words

2. Describe the assumptions of the `lexical hypothesis` of personality, and discuss how it influenced the development of structural models of personality, starting with the work of Allport and Osbert (1936) and ending with the Big Five model of personality we have today. 1000 words

2000 words