Nine Types of Temperament Model (NTTM) is a model that focuses on understanding the origins of human behavior and places the concept of temperament at the center of individual differences. According to NTTM, each person is born with one of nine different temperament types which have a quest, intention and motivation for themselves. Our innate temperament type is highly effective on our behavior, feelings and thoughts. In fact, our temperament type is the most fundamental factor that determines the way we perceive life, how we interpret events and situations, the way we relate our decisions and intentions.

Nine Types of Temperament Model is a model that recognizes human beings as a whole in terms of bodily, psychological and spirituality, prospects to its structural and functional resources and identifies a scientific and original human being who can determine positive potentials and risky features that are open to negativity, and hence individual differences, and take its power from universality without neglecting its indigenous features.

Nine Types of Temperament Model examines the human structure in terms of the temperament-centered perspective including physical, emotional, cognitive characteristics which are the constitutes of the basic structural of individual differences. The interaction of the individual with the structural temperament code and the internal factors as age, intelligence, gender, biological characteristics, ethnic origin, and etc. and external factors as education, culture, belief, family, work life, marriage, life events, and etc. constitute the personality organization of that individual. Also, according to NTTM, natural personality is the part of the personality that is developed in the direction of the characteristics which already has as a structural potential on the basis of the temperament type of the individual's personality. On the other hand, synthetic personality is defined as personality that does not exist within the self, to the contrary, develops through contribution of education, family, society and culture. Synthetic personality is acquired from some structural features thanks to the external factors. In other words, individual gains some properties through the direction of the development. In this context, individual’s unique psychological organization; It treats and explains systematically the structural temperament characteristics of the individual as perceptual priority, life perspective and basic existential motivation, both static and dynamic properties, ranging from natural perceptual priorities to naturally evolving and subsequently acquired synthetic properties.