Rational temperament
The Rational temperament is one of the four temperaments defined by David Keirsey. Correlating with the NT (intuitive–thinking) Myers-Briggs types, the Rational temperament comprises the following role variants (listed with their corresponding Myers-Briggs types): Architect (INTP), Fieldmarshal (ENTJ), Inventor (ENTP), and The Mastermind (INTJ). This temperament makes up only 5 to 10 percent of the general population, making this the smallest temperament group of all.
Description
Rationals are abstract in speech and utilitarian in pursuing their goals. Their greatest strength is strategy. Their most developed intelligence role is that of either the Engineer (Architects and Inventors) or the Coordinator (Masterminds and Fieldmarshals).
As the knowledge-seeking temperament, Rationals trust reason implicitly. They rely on objective observations and factual analysis in any given situation. They seek a logical argument as a basis for action. As strategists, Rationals strive to gain as much information as possible, applying what they learn to develop long-term plans and the steps for achieving them. They are characterized by a tough-minded personal style, tending to pursue either power or understanding. They are often strong-willed, ambitious, intelligent, and self-determined. Subjective thoughts and emotion have no place in the decision-making process of a Rational. Driven to excel, they work hard to achieve their goals, and they do well where they can take control or work independently on a task.