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The biological model does not represent a consistent, theoretical approach; rather it is a compilation of efforts looking for associations between personality and biology. The biological perspective is linked to the dispositional perspective since both attempt to recognize fundamental, consistent individual differences (http://www.cognitivebehavior.com).
There are underlying assumptions for both dispositional and biological perspectives. It is these underlying assumptions that are the basis to the concepts behind the theories. .
The fundamental supposition of dispositional perspective is that of the stability of personality. What this means is the way individuals display consistency in their actions, thoughts and feelings between situations as well as over time. Basically unpredictability doesn't identify the real meaning of personality (http://www.cognitivebehavior.com).
Yet another assumption for disposition perspective is the ideology that you are the same person you used to be and will be in the future.
We all know that there are differences between people. Dispositions are made up of various compositions and can vary from person to person enabling each of us to have our own unique identity.
There are two types of dispositional theories, type theories and trait theories. Type theories, assign people to different categories depending on their temperament. According to both Hippocrates and Galen they believed that temperament was associated with body fluids. .
Blood is associated with a sanguine personality. Phlegm is associated with individuals that are slow to action, lethargic. Black bile is associated with those who have a melancholic personality, while those with yellow bile are said to have a choleric personality. Further, Hippocrates and Galen believed that the predominant fluid determined his or her personality (http://www.sci.csuhayward.edu).
In contrast to type theories, trait theories assume that people have various traits, which are continuing qualities that individuals possess in different amounts.
