Compose a 1500 words essay on Internal Consumer Behavior. Needs to be plagiarism free! This set of characteristics or can said to be the personality of an individual. Since the late 19th-century personality study has emerged as the sole way to understand a person and almost every discipline that is related to social study or human relations, in the modern times, is trying to represent their points from the perspective of personality analysis of individuals. (Gilbert and Connolly, 1991, 23)The 19th and 20th century has witnessed great progress in the field of personality analysis and several famous figures have appeared in this arena who have interpreted human psychology in their own ways and it has helped them to come up with different types of personality theory. Results of such analysis have been used in various disciplines of human actions, starting from literature to selling of products. Among various other disciplines personality theories proved to be a boon for the business houses and industrialists and these theories opened up different avenues to them through with they started reaching people in the way that was never experienced before. Analysis of the personality theories helped the business house to understand their consumerist traits and they started to launch their products according to the desire of the mass. At the same time, various innovations were also implemented to the methods of advertising and the business groups, in order to expand their consumer circle, used advertisement so that it can capitalize over personality traits of an individual. The personality theories can be classified into seven major divisions, namely, a) Trait theories, b) Type theories, c) Psychoanalytic theories, d) Behaviorist theories, e) Social cognitive theory, f) Humanistic theory and g) Biopsychological theories.