ISTJ (introverted, etc., sensory, intellectual, etc. structuralist) is an abbreviation used in the test, published personality test Myers-Briggs (MBTI) to refer to one of sixteen personality type goes to work. It was developed by the leading psychiatrist Carl Jung in his book types of psyche. Jung proposed a psychological diagnosis based on the theory of cognitive functions developed by his clinical observations.< < > "people with a type have a quiet AND personality and love security and a peaceful life.are. They are committed people who take their responsibilities very seriously.

the features of the people responsible and reliable, which makes their duties up to the end, track work, and because of the systematic approach and that are often responsible for tasks that they delegate will be well on, come.< < > personally, people are usually loyal steadfast and trustworthy, and they are judged for honesty and monotony in people of great importance."after Jung، others expanded the brigade and worked on en. Jung's personality assessment model includes the test developed by Isabel Briggs Myers and Catherine Cook Briggs and the and mood assessment model developed by Davidr Asey. R to suggested the word inspector that one of the four brigades belonged to the temper of the guards. make up about 10-14٪ of the world's population.