Analysis of Psychological Traits In the late 1970s Hans Eysenck modified his two-dimensional model of personality to allow for a third trait known as psychoticism. This trait, now part of Eysenck's Psychoticism-Extroversion-Neuroticism psychological model, is a personality-situated pattern that Eysenck found and defined as the aggressive part of the personality. It is from psychoticism that Eysenck believed all hostility towards human beings derived. From Eysenck's studies on the development of psychosis he began to formulate a theory according to which there was a correlation between high levels of this particular characteristic and the development of mental problems such as schizophrenia. He also believed that psychoticism was rooted in genetic biology. He studied whether directly related individuals shared high levels of psychoticism, and if this formed a true correlation, he could then find the element of the genetic structure of humans that harbored psychoticism. Over time Eysenck began to see similarities with other factor models of personality such as the three-factor model developed by Auke Tellegen. This was seen by Eysenck in the fact that psychoticism can be further broken down into smaller traits such as impulsivity through the use of factor analysis. From this point on, impulsiveness can be further dismantled by dividing it into parts such as taking a rickshaw. It is from this point that Eysenck's critics have found that they believe the trait itself is too broad to be defined as a single trait. Most critics of Eysenck's theory of psychoticism as an aspect of personality agree that the large amount of correlation with other further defined models means that psychoticism requires greater factor analysis to adequately describe personality. personality dimensions. An ideal society offers each person the opportunity to make the most of their characteristics and abilities. However, some people will adapt to the social environment better than others. The person with a high level of psychoticism, for example, characterized by hostile and aggressive behavior, may become emotionally disturbed, or display criminal tendencies, or channel aggressive traits into a socially acceptable endeavor such as coaching college football. (Schultz & Schultz, 2013, p. 227) From this writing of Eysenck's ideas by Schultz and Schultz the conclusion that any researcher of psychoticism should reach is the same: that the world needs all three dimensions of personalities together to function and act as checks and balances on each other. When all three dimensions are in balance, we form the basis of all human interaction.