 This tradition is operationalized in the modern era by the plethora of personality tools used in leadership research and practice.Popular examples include the Myers Briggs Type Indicator (MBTI), the Fundamental Interpersonal Relations Orientations-Behavior(FIRO-B), and assessment tools based on the Five-Factor Model of personality like the NEO PI-R or Hogan Personality Inventory (HPI).These personality measures are based on a standard psychological paradigm and were designed to show the level of interpersonal and social functioning of an individual.