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ISTJ Main Page

ISTJ Main Page

IIntrovert. Inner-directed; need ample
alone time; slow and steady, focus on
one task at a time; reserved & cautious

SSensor. Practical & task-oriented;
prefer action over reflection; excel at
handling details & concrete tasks

TThinker. Use logical analysis to
make decisions; attuned to facts,
consistency & fairness

JJudger. Outwardly firm, direct,
and decisive; conveying closure;
planful & conscientious

ISTJs’ Dominant Function

Introverted Sensing

Introverted Sensing Stabilizing Icon

Stabilizes beliefs, decisions & behavior by drawing on past experience & learning; embraces the “tried and true”

ISTJs’ Auxiliary Function

Extraverted Thinking

Extraverted Thinking Structuring Icon

Rationally structures & organizes ideas, things & processes; consults established facts & methods in decision-making

Key ISTJ Traits:

  • Loyal, dutiful, reliable, and responsible in all aspects of life: as friends, parents, spouses, employees, etc.
  • Embrace what’s familiar—the “tried and true”—including long-held routines, practices, and traditions
  • Foster and sustain traditions that substantiate familial bonds and continuity with the past
  • Faithfully carry out duties, commitments, and responsibilities
  • Appreciate alone time, but also willing to partake in requisite social activities
  • Turn to the past to guide and inform decision-making
  • Vividly recall past experiences and their attendant responses
  • Evaluate their own and others’ behavior according to firm principles and standards
  • Maintain and defend core tenets regarding right and wrong, truth and falsehood
  • Enjoy sharing their knowledge and lending advice to others
  • Tend to downplay their own emotional needs and misfortunes, commonly exhibiting a stoic attitude toward life; find ways of “soldiering on”
  • Participate in and contribute to valued organizations—religious, educational, community, or otherwise
  • Prefer clear guidelines and expectations in the workplace
  • Bring a careful and methodical approach to their work, including attention to detail
  • Reliable team players, diligently carrying out their designated duties
  • Commonly drawn to teaching, administrative, or management roles in education, ministry, business, or elsewhere; may also take interest in accounting, law, finance, medicine, or technical fields

Learn More about ISTJs in Our Books:

My True Type: Clarifying Your Personality Type, Preferences & Functions

The 16 Personality Types: Profiles, Theory & Type Development

Both Books

More ISTJ Resources:

ISTJ Type Profile

ISTJ Careers

Personality Type Basics (Typology 101)

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About A.J. Drenth

A.J. is a four-time author and recognized authority on personality typology. He founded Personality Junkie® in 2009 which has since grown to see over 3 million annual visitors. His work has been referenced in numerous publications and he currently boasts the two best-selling INTP books worldwide. Read A.J.'s bio here.

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