1.1 BACKGROUND TO THE STUDY
Personality is something everybody knows that it exists, but nobody knows that what it is (Schneewind and Ruppert, 1998). It is certainly true that it is difficult to put human personality which Goethe (1970) called the greatest happiness for children of this earth into scientific terms. Personality determines a set of important characteristics and that how people interact with others. Human personality is the combination of a number of traits.