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ISTJ - Introverted Sensing Thinking Judging

Great sense of responsibility, realism, organizing abilities, command of the facts, thoroughly completes tasks, great attention to detail, logical, pragmatists at heart, committed.

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Famous ISTJ:  Harry Truman

For ISTJs the dominant quality in their lives is great sense of responsibility for doing what needs to be done in the here-and-now.  Their realism, organizing abilities, and command of the facts lead to their completing tasks thoroughly and with great attention to detail.  Logical pragmatists at heart, ISTJs make decisions based on their experience and with an eye to efficiency in all things.

ISTJs are intensely committed to people and to the organizations of which they are a part; they take their work seriously and believe others should do so as well. 

Source: Looking at Type: The Fundamentals, Center for the Application of Psychological Type, 1997

Some interesting facts about ISTJ personality types.

Among the four highest in college GPA. Source: MBTI Manual, 1998, by Myers et al.
Overrepresented among bank officers and financial managers. Source: MBTI Manual, 1998
One of the top 2 types among industrial/technical teachers. Source: MBTI Manual, 1998
Higher on deductive reasoning than dominant Thinking or Feeling types, with other dominant Sensing types. Source: J.K. DiTiberio in MBTI Applications by A.L. Hammer, 1996
Academic subjects preferred: math, practical skills. Source: I.M. Myers & M.H. McCaulley in Manual: A guide to the development and use of the MBTI, 1985.
More frequent among African Americans. Source: L.K. Kirby & N.J. Barger in MBTI Applications, by A.L. Hammer, 1996
In national sample, highest of all types in liking work environments where "Everything is done by the book" and one of 3 highest types in liking "Toeing the line"; lowest of all types in liking work environments with "People of different backgrounds." Source: MBTI Manual, 1998
In national sample, dissatisfied with "Promotions" in their jobs. Source: MBTI Manual, 1998
Overrepresented among both male and female small business owners compared with national sample. Source: MBTI Manual, 1998
With ISFJs, far outnumber dominant extraverted Sensing types among chronic pain patients. Source: J. Shelton in MBTI Applications by A.L. Hammer, 1996.
Overrepresented among men with chronic pain - accounted for 38% of sample studied. Source: J. Shelton, 1996.
Overrepresented among men at risk for heart attack - more than 3.5 times the proportion in Myers' high school sample. Source: J. Shelton, 1996
One of two most overrepresented female types in a substance abuse program. Source: N.L. Quenk & A.T. Quenk, in MBTI Applications by A.L. Hammer, 1996
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