Biological Factors Can Predict Personality

A layman would define personality as an individual’s characteristics in terms of how they think and behave. Many theorists, however, interprets personality differently resulting in various personality theories. Personality is determined by traits which are behaviours displayed by a person in most given situations. How a person reacts to common circumstances may also be used to foresee future behaviours. Traits are then categorized into types that allow easier comparisons to be made between each individual’s attributes. The focus of this paper would be on the biological aspects of personality whereby traits are thought to be inheritable through genetics and associated with the central nervous system. Behavioural genetics are research that makes use of results from studies done on family, twins and adoptions. The findings of how both genes and environment influences personality from the studies will be discussed. Some researchers found possible issues with the representativeness of such studies. The outline of Eysenck’s biological model of personality and arousal, Gray’s BAS/BIS theory and Cloninger’s biological model of personality will further explain the biological effect on personality.
An individual’s behaviour may differ depending on the circumstances they are in though there are definite signs of repetitive behaviour when placed in majority of the situations. These characteristics are known as traits which make up the personality of each person (Engler, 2014). Personality theorists do not have a mutual agreement on how the term personality should be used. They each have their definition of personality thus providing a large number of diverse personality theories (Engler, 2014). For example, Eysenck (1970) defined personality as a relatively permanent and consistent composition of an individual’s disposition that in turn establishes how the person adjusts to their