Biological basis of personality
Personality is not a neat science. From the beginning there has been fuzzy boundaries on the definition of all the factors involved in personality assessment. With the major assessment tool being the five factor model being derived from a "lexicographer's nightmare," early in the 20th century, it is not surprising that a great deal of effort has been invested in clarifying structures amenable to research.
Zuckerman (1993) has given the field a framework for sorting out the mess. …
