Free 16 Personality Type Test - Find Your Type

Not sure what Myers Briggs type you are? Take a free Jungian Type (16 types) test to find out what your type is.

16 Types

ISTJ Subtypes

Each ISTJ result has subtle differences, which can be captured through subtypes.

Page contents:


Knowing you are an ISTJ helps you understand how to interact with the world around you. But there will be extra detail hidden within each of the four letters. We dive deeper into each letter and introduce the concept of 'subtypes' and how they can further explain your unique personality.


An ISTJ knows they are introverted. But what type of introvert are they? Subtypes help to define the differences.

ISTJ Subtypes

What variations exist within type ISTJ?

The MBTI result of ISTJ can be broken down further to reveal a more nuanced personality profile. Have you had a Myers Briggs result ISTJ and thought "that's kind of me"? That could be because each of the four letters has two variants, or 'subtypes'. Let's take a deeper look at the subtypes contained within type ISTJ.

face reading open book

The four letters of the 16 types model (for example Myers Briggs®) are a useful shorthand to describe personality types. If you want a little more detail it's possible to look at subtypes.

An ISTJ knows they are (I)ntroverted, (S)ensing, (T)hinking, and (J)udging. But what type of introvert are they? And what form does their thinking take? Subtypes are a way of answering those questions.


Introverted: the Subtypes

Two variants of introversion: independent and reflective

Introversion has an interpersonal dimension (Independent), and an intrapersonal dimension (Reflective). Interpersonally, introverts prefer their own company and find time alone regenerative. Intrapersonally, introverts direct their time and energy inwards, reflecting on their thoughts, feelings, and emotions to gain deeper insight.

  • Ii: Introverted-Independent
  • Ir: Introverted-Reflective

Ii and Ir: What's The Difference?

Introverted types can take the form of two variants: Ii and Ir

Introverts can lean towards being either introverted-independent or introverted-reflective. There are subtle differences, which are listed here.

Extended subtype:

Ii
Primary type:
Introverted (I)
Subtype:
Independent (i)
What this means:
Independent introverts prefer own company, work best alone, and prioritize individual pursuits.

Extended subtype:

Ir
Primary type:
Introverted (I)
Subtype:
Reflective (r)
What this means:
Reflective introverts tend to spend time introspecting on emotions, feelings, and ideas.

Sensing: the subtypes

Two variants of sensing: practical and empirical

Sensing types generally fall under one of two categories which outline their mode of thinking, practical or empirical. Practical sensing types rely on personal experience, common sense, and basic knowledge to solve problems. Empirical sensing types solve problems using facts, figures, and the scientific method.

  • Se: Sensing-Empirical
  • Sp: Sensing-Practical

Se and Sp: What's The Difference?

Sensing types can take the form of two variants

Sensing types can lean towards being either sensing-empirical or sensing-practical. There are subtle differences, which are listed here.

Extended subtype:

Se
Primary type:
Sensing (S)
Subtype:
Empirical (e)
What this means:
Empirical Sensing types will follow a methodical approach to solving a problem.

Extended subtype:

Sp
Primary type:
Sensing (S)
Subtype:
Practical (p)
What this means:
Practical Sensing types utilize their past experiences to intuit how to tackle an issue.

Thinking: the subtypes

Two variants of thinking: Logical and Objective

Thinkers fall under one of two categories, logical thinkers and objective thinkers. Logical thinkers focus on applying rule based thinking, relying on deductive and inductive reasoning. Objective thinkers, however, focus on removing the emotional element from decision-making, maintaining a stoic and unbiased approach.

  • Tl: Thinking-Logical
  • To: Thinking-Objective

Tl and To: What's The Difference?

Thinking types can take the form of two variants: Tl and To

Thinking types can lean towards being either thinking-logical or thinking-objective. There are subtle differences, which are listed here.

Extended subtype:

Tl
Primary type:
Thinking (T)
Subtype:
Logical (l)
What this means:
Logical thinkers focus on structured rule based thinking, often with formulae and deduction.

Extended subtype:

To
Primary type:
Thinking (T)
Subtype:
Objective (o)
What this means:
Objective thinkers focus on removing emotion from decisions, remaining stoic and unbiased.

Judging: the subtypes

Two variants of judging: logical and objective

Judging types tend to be either results focused (Thorough), or process focused (Methodical). Thorough judging types are perfectionists that display high levels of attention to detail. Methodical judging types, however, are more process orientated, focused on following discrete steps and adhering to instructions.

  • Jt: Judging-Thorough
  • Jm: Judging-Methodical

Jt and Jm: What's The Difference?

Judging types can take the form of two variants: Jt and Jm

Judging types can lean towards being either judging-thorough or judging-methodical. There are subtle differences, which are listed here.

Extended subtype:

Jt
Primary type:
Judging (J)
Subtype:
Thorough (t)
What this means:
Judging-Thorough suggests a meticulous, detailed orientated, and perfectionistic approach.

Extended subtype:

Jm
Primary type:
Judging (J)
Subtype:
Methodical (m)
What this means:
Judging-Methodical suggests a highly structured, ordered, and process driven focused approach.
  • Extended Subtype: Ii-Se-Tl-Jt

    Overview of the Ii-Se-Tl-Jt extended subtype

    Ii

    Introvert

    (independent)

    Independent introverts prefer own company, work best alone, and prioritize individual pursuits.

    Se

    Sensing

    (empirical)

    Empirical Sensing types will follow a methodical approach to solving a problem.

    Tl

    Thinking

    (logical)

    Logical-thinking subtypes tend to strong users of deduction and formulae, readily utilizing a structured and rule based thinking pattern to understand the world.

    Jt

    Judging

    (thorough)

    Judging-thorough suggests a meticulous, details-orientated, and perfectionistic approach.

    Ii-Se-Tl-Jt

    Ii: The introverted-independent type like to spend time in their own company, preferring to partake in solo activities and pursuits, and they work well alone.

    Se: The sensing-empirical type tend to solve problems by following an orderly and methodical approach.

    Tl: The logical-thinking type tend to strong users of deduction and formulae, readily utilizing a structured and rule based thinking pattern to understand the world.

    Jt: The judging-thorough type are perfectionists in their pursuit of being details-focused. They can mean that they are particular and uncompromising if the details of an argument doesn't quite fit.

  • Extended Subtype: Ii-Se-Tl-Jm

    Overview of the Ii-Se-Tl-Jm extended subtype

    Ii

    Introvert

    (independent)

    Independent introverts prefer own company, work best alone, and prioritize individual pursuits.

    Se

    Sensing

    (empirical)

    Empirical Sensing types will follow a methodical approach to solving a problem.

    Tl

    Thinking

    (logical)

    Logical-thinking subtypes tend to strong users of deduction and formulae, readily utilizing a structured and rule based thinking pattern to understand the world.

    Jm

    Judging

    (methodical)

    Judging-methodical suggests a highly-structured, ordered, and process-driven approach.

    Ii-Se-Tl-Jm

    Ii: The introverted-independent type like to spend time in their own company, preferring to partake in solo activities and pursuits, and they work well alone.

    Se: The sensing-empirical type tend to solve problems by following an orderly and methodical approach.

    Tl: The logical-thinking type tend to strong users of deduction and formulae, readily utilizing a structured and rule based thinking pattern to understand the world.

    Jm: The judging-methodical type are followers of process, preferring a rigid, structured and ordered approach. This can mean that they oppose more chaotic or spontaneous approaches.

  • Extended Subtype: Ii-Se-To-Jt

    Overview of the Ii-Se-To-Jt extended subtype

    Ii

    Introvert

    (independent)

    Independent introverts prefer own company, work best alone, and prioritize individual pursuits.

    Se

    Sensing

    (empirical)

    Empirical Sensing types will follow a methodical approach to solving a problem.

    To

    Thinking

    (objective)

    Objective-thinking subtypes tend to focus on remaining stoic and unbiased, attempting always to remove any emotionality from their decision-making.

    Jt

    Judging

    (thorough)

    Judging-thorough suggests a meticulous, details-orientated, and perfectionistic approach.

    Ii-Se-To-Jt

    Ii: The introverted-independent type like to spend time in their own company, preferring to partake in solo activities and pursuits, and they work well alone.

    Se: The sensing-empirical type tend to solve problems by following an orderly and methodical approach.

    To: The objective-thinking type tend to focus on remaining stoic and unbiased, attempting always to remove any emotionality from their decision-making.

    Jt: The judging-thorough type are perfectionists in their pursuit of being details-focused. They can mean that they are particular and uncompromising if the details of an argument doesn't quite fit.

  • Extended Subtype: Ii-Se-To-Jm

    Overview of the Ii-Se-To-Jm extended subtype

    Ii

    Introvert

    (independent)

    Independent introverts prefer own company, work best alone, and prioritize individual pursuits.

    Se

    Sensing

    (empirical)

    Empirical Sensing types will follow a methodical approach to solving a problem.

    To

    Thinking

    (objective)

    Objective-thinking subtypes tend to focus on remaining stoic and unbiased, attempting always to remove any emotionality from their decision-making.

    Jm

    Judging

    (methodical)

    Judging-methodical suggests a highly-structured, ordered, and process-driven approach.

    Ii-Se-To-Jm

    Ii: The introverted-independent type like to spend time in their own company, preferring to partake in solo activities and pursuits, and they work well alone.

    Se: The sensing-empirical type tend to solve problems by following an orderly and methodical approach.

    To: The objective-thinking type tend to focus on remaining stoic and unbiased, attempting always to remove any emotionality from their decision-making.

    Jm: The judging-methodical type are followers of process, preferring a rigid, structured and ordered approach. This can mean that they oppose more chaotic or spontaneous approaches.

  • Extended Subtype: Ii-Sp-Tl-Jt

    Overview of the Ii-Sp-Tl-Jt extended subtype

    Ii

    Introvert

    (independent)

    Independent introverts prefer own company, work best alone, and prioritize individual pursuits.

    Sp

    Sensing

    (practical)

    Practical Sensing types utilize their past experiences to intuit how to tackle an issue.

    Tl

    Thinking

    (logical)

    Logical-thinking subtypes tend to strong users of deduction and formulae, readily utilizing a structured and rule based thinking pattern to understand the world.

    Jt

    Judging

    (thorough)

    Judging-thorough suggests a meticulous, details-orientated, and perfectionistic approach.

    Ii-Sp-Tl-Jt

    Ii: The introverted-independent type like to spend time in their own company, preferring to partake in solo activities and pursuits, and they work well alone.

    Sp: The sensing-practical type tend to reflect on their past experiences to help them judge how best to tackle their new issues.

    Tl: The logical-thinking type tend to strong users of deduction and formulae, readily utilizing a structured and rule based thinking pattern to understand the world.

    Jt: The judging-thorough type are perfectionists in their pursuit of being details-focused. They can mean that they are particular and uncompromising if the details of an argument doesn't quite fit.

  • Extended Subtype: Ii-Sp-Tl-Jm

    Overview of the Ii-Sp-Tl-Jm extended subtype

    Ii

    Introvert

    (independent)

    Independent introverts prefer own company, work best alone, and prioritize individual pursuits.

    Sp

    Sensing

    (practical)

    Practical Sensing types utilize their past experiences to intuit how to tackle an issue.

    Tl

    Thinking

    (logical)

    Logical-thinking subtypes tend to strong users of deduction and formulae, readily utilizing a structured and rule based thinking pattern to understand the world.

    Jm

    Judging

    (methodical)

    Judging-methodical suggests a highly-structured, ordered, and process-driven approach.

    Ii-Sp-Tl-Jm

    Ii: The introverted-independent type like to spend time in their own company, preferring to partake in solo activities and pursuits, and they work well alone.

    Sp: The sensing-practical type tend to reflect on their past experiences to help them judge how best to tackle their new issues.

    Tl: The logical-thinking type tend to strong users of deduction and formulae, readily utilizing a structured and rule based thinking pattern to understand the world.

    Jm: The judging-methodical type are followers of process, preferring a rigid, structured and ordered approach. This can mean that they oppose more chaotic or spontaneous approaches.

  • Extended Subtype: Ii-Sp-To-Jt

    Overview of the Ii-Sp-To-Jt extended subtype

    Ii

    Introvert

    (independent)

    Independent introverts prefer own company, work best alone, and prioritize individual pursuits.

    Sp

    Sensing

    (practical)

    Practical Sensing types utilize their past experiences to intuit how to tackle an issue.

    To

    Thinking

    (objective)

    Objective-thinking subtypes tend to focus on remaining stoic and unbiased, attempting always to remove any emotionality from their decision-making.

    Jt

    Judging

    (thorough)

    Judging-thorough suggests a meticulous, details-orientated, and perfectionistic approach.

    Ii-Sp-To-Jt

    Ii: The introverted-independent type like to spend time in their own company, preferring to partake in solo activities and pursuits, and they work well alone.

    Sp: The sensing-practical type tend to reflect on their past experiences to help them judge how best to tackle their new issues.

    To: The objective-thinking type tend to focus on remaining stoic and unbiased, attempting always to remove any emotionality from their decision-making.

    Jt: The judging-thorough type are perfectionists in their pursuit of being details-focused. They can mean that they are particular and uncompromising if the details of an argument doesn't quite fit.

  • Extended Subtype: Ii-Sp-To-Jm

    Overview of the Ii-Sp-To-Jm extended subtype

    Ii

    Introvert

    (independent)

    Independent introverts prefer own company, work best alone, and prioritize individual pursuits.

    Sp

    Sensing

    (practical)

    Practical Sensing types utilize their past experiences to intuit how to tackle an issue.

    To

    Thinking

    (objective)

    Objective-thinking subtypes tend to focus on remaining stoic and unbiased, attempting always to remove any emotionality from their decision-making.

    Jm

    Judging

    (methodical)

    Judging-methodical suggests a highly-structured, ordered, and process-driven approach.

    Ii-Sp-To-Jm

    Ii: The introverted-independent type like to spend time in their own company, preferring to partake in solo activities and pursuits, and they work well alone.

    Sp: The sensing-practical type tend to reflect on their past experiences to help them judge how best to tackle their new issues.

    To: The objective-thinking type tend to focus on remaining stoic and unbiased, attempting always to remove any emotionality from their decision-making.

    Jm: The judging-methodical type are followers of process, preferring a rigid, structured and ordered approach. This can mean that they oppose more chaotic or spontaneous approaches.

  • Extended Subtype: Ir-Se-Tl-Jt

    Overview of the Ir-Se-Tl-Jt extended subtype

    Ir

    Introvert

    (reflective)

    Reflective introverts tend to spend time introspecting on emotions, feelings, and ideas.

    Se

    Sensing

    (empirical)

    Empirical Sensing types will follow a methodical approach to solving a problem.

    Tl

    Thinking

    (logical)

    Logical-thinking subtypes tend to strong users of deduction and formulae, readily utilizing a structured and rule based thinking pattern to understand the world.

    Jt

    Judging

    (thorough)

    Judging-thorough suggests a meticulous, details-orientated, and perfectionistic approach.

    Ir-Se-Tl-Jt

    Ir: The introverted-reflective type like to spend time introspecting on their feelings and emotions, as well as ruminating on any ideas they have and need time to unpack.

    Se: The sensing-empirical type tend to solve problems by following an orderly and methodical approach.

    Tl: The logical-thinking type tend to strong users of deduction and formulae, readily utilizing a structured and rule based thinking pattern to understand the world.

    Jt: The judging-thorough type are perfectionists in their pursuit of being details-focused. They can mean that they are particular and uncompromising if the details of an argument doesn't quite fit.

  • Extended Subtype: Ir-Se-Tl-Jm

    Overview of the Ir-Se-Tl-Jm extended subtype

    Ir

    Introvert

    (reflective)

    Reflective introverts tend to spend time introspecting on emotions, feelings, and ideas.

    Se

    Sensing

    (empirical)

    Empirical Sensing types will follow a methodical approach to solving a problem.

    Tl

    Thinking

    (logical)

    Logical-thinking subtypes tend to strong users of deduction and formulae, readily utilizing a structured and rule based thinking pattern to understand the world.

    Jm

    Judging

    (methodical)

    Judging-methodical suggests a highly-structured, ordered, and process-driven approach.

    Ir-Se-Tl-Jm

    Ir: The introverted-reflective type like to spend time introspecting on their feelings and emotions, as well as ruminating on any ideas they have and need time to unpack.

    Se: The sensing-empirical type tend to solve problems by following an orderly and methodical approach.

    Tl: The logical-thinking type tend to strong users of deduction and formulae, readily utilizing a structured and rule based thinking pattern to understand the world.

    Jm: The judging-methodical type are followers of process, preferring a rigid, structured and ordered approach. This can mean that they oppose more chaotic or spontaneous approaches.

  • Extended Subtype: Ir-Se-To-Jt

    Overview of the Ir-Se-To-Jt extended subtype

    Ir

    Introvert

    (reflective)

    Reflective introverts tend to spend time introspecting on emotions, feelings, and ideas.

    Se

    Sensing

    (empirical)

    Empirical Sensing types will follow a methodical approach to solving a problem.

    To

    Thinking

    (objective)

    Objective-thinking subtypes tend to focus on remaining stoic and unbiased, attempting always to remove any emotionality from their decision-making.

    Jt

    Judging

    (thorough)

    Judging-thorough suggests a meticulous, details-orientated, and perfectionistic approach.

    Ir-Se-To-Jt

    Ir: The introverted-reflective type like to spend time introspecting on their feelings and emotions, as well as ruminating on any ideas they have and need time to unpack.

    Se: The sensing-empirical type tend to solve problems by following an orderly and methodical approach.

    To: The objective-thinking type tend to focus on remaining stoic and unbiased, attempting always to remove any emotionality from their decision-making.

    Jt: The judging-thorough type are perfectionists in their pursuit of being details-focused. They can mean that they are particular and uncompromising if the details of an argument doesn't quite fit.

  • Extended Subtype: Ir-Se-To-Jm

    Overview of the Ir-Se-To-Jm extended subtype

    Ir

    Introvert

    (reflective)

    Reflective introverts tend to spend time introspecting on emotions, feelings, and ideas.

    Se

    Sensing

    (empirical)

    Empirical Sensing types will follow a methodical approach to solving a problem.

    To

    Thinking

    (objective)

    Objective-thinking subtypes tend to focus on remaining stoic and unbiased, attempting always to remove any emotionality from their decision-making.

    Jm

    Judging

    (methodical)

    Judging-methodical suggests a highly-structured, ordered, and process-driven approach.

    Ir-Se-To-Jm

    Ir: The introverted-reflective type like to spend time introspecting on their feelings and emotions, as well as ruminating on any ideas they have and need time to unpack.

    Se: The sensing-empirical type tend to solve problems by following an orderly and methodical approach.

    To: The objective-thinking type tend to focus on remaining stoic and unbiased, attempting always to remove any emotionality from their decision-making.

    Jm: The judging-methodical type are followers of process, preferring a rigid, structured and ordered approach. This can mean that they oppose more chaotic or spontaneous approaches.

  • Extended Subtype: Ir-Sp-Tl-Jt

    Overview of the Ir-Sp-Tl-Jt extended subtype

    Ir

    Introvert

    (reflective)

    Reflective introverts tend to spend time introspecting on emotions, feelings, and ideas.

    Sp

    Sensing

    (practical)

    Practical Sensing types utilize their past experiences to intuit how to tackle an issue.

    Tl

    Thinking

    (logical)

    Logical-thinking subtypes tend to strong users of deduction and formulae, readily utilizing a structured and rule based thinking pattern to understand the world.

    Jt

    Judging

    (thorough)

    Judging-thorough suggests a meticulous, details-orientated, and perfectionistic approach.

    Ir-Sp-Tl-Jt

    Ir: The introverted-reflective type like to spend time introspecting on their feelings and emotions, as well as ruminating on any ideas they have and need time to unpack.

    Sp: The sensing-practical type tend to reflect on their past experiences to help them judge how best to tackle their new issues.

    Tl: The logical-thinking type tend to strong users of deduction and formulae, readily utilizing a structured and rule based thinking pattern to understand the world.

    Jt: The judging-thorough type are perfectionists in their pursuit of being details-focused. They can mean that they are particular and uncompromising if the details of an argument doesn't quite fit.

  • Extended Subtype: Ir-Sp-Tl-Jm

    Overview of the Ir-Sp-Tl-Jm extended subtype

    Ir

    Introvert

    (reflective)

    Reflective introverts tend to spend time introspecting on emotions, feelings, and ideas.

    Sp

    Sensing

    (practical)

    Practical Sensing types utilize their past experiences to intuit how to tackle an issue.

    Tl

    Thinking

    (logical)

    Logical-thinking subtypes tend to strong users of deduction and formulae, readily utilizing a structured and rule based thinking pattern to understand the world.

    Jm

    Judging

    (methodical)

    Judging-methodical suggests a highly-structured, ordered, and process-driven approach.

    Ir-Sp-Tl-Jt

    Ir: The introverted-reflective type like to spend time introspecting on their feelings and emotions, as well as ruminating on any ideas they have and need time to unpack.

    Sp: The sensing-practical type tend to reflect on their past experiences to help them judge how best to tackle their new issues.

    Tl: The logical-thinking type tend to strong users of deduction and formulae, readily utilizing a structured and rule based thinking pattern to understand the world.

    Jm: The judging-methodical type are followers of process, preferring a rigid, structured and ordered approach. This can mean that they oppose more chaotic or spontaneous approaches.

  • Extended Subtype: Ir-Sp-To-Jt

    Overview of the Ir-Sp-To-Jt extended subtype

    Ir

    Introvert

    (reflective)

    Reflective introverts tend to spend time introspecting on emotions, feelings, and ideas.

    Sp

    Sensing

    (practical)

    Practical Sensing types utilize their past experiences to intuit how to tackle an issue.

    To

    Thinking

    (objective)

    Objective-thinking subtypes tend to focus on remaining stoic and unbiased, attempting always to remove any emotionality from their decision-making.

    Jt

    Judging

    (thorough)

    Judging-thorough suggests a meticulous, details-orientated, and perfectionistic approach.

    Ir-Sp-To-Jt

    Ir: The introverted-reflective type like to spend time introspecting on their feelings and emotions, as well as ruminating on any ideas they have and need time to unpack.

    Sp: The sensing-practical type tend to reflect on their past experiences to help them judge how best to tackle their new issues.

    To: The objective-thinking type tend to focus on remaining stoic and unbiased, attempting always to remove any emotionality from their decision-making.

    Jt: The judging-thorough type are perfectionists in their pursuit of being details-focused. They can mean that they are particular and uncompromising if the details of an argument doesn't quite fit.

  • Extended Subtype: Ir-Sp-To-Jm

    Overview of the Ir-Sp-To-Jm extended subtype

    Ir

    Introvert

    (reflective)

    Reflective introverts tend to spend time introspecting on emotions, feelings, and ideas.

    Sp

    Sensing

    (practical)

    Practical Sensing types utilize their past experiences to intuit how to tackle an issue.

    To

    Thinking

    (objective)

    Objective-thinking subtypes tend to focus on remaining stoic and unbiased, attempting always to remove any emotionality from their decision-making.

    Jm

    Judging

    (methodical)

    Judging-methodical suggests a highly-structured, ordered, and process-driven approach.

    Ir-Sp-To-Jm

    Ir: The introverted-reflective type like to spend time introspecting on their feelings and emotions, as well as ruminating on any ideas they have and need time to unpack.

    Sp: The sensing-practical type tend to reflect on their past experiences to help them judge how best to tackle their new issues.

    To: The objective-thinking type tend to focus on remaining stoic and unbiased, attempting always to remove any emotionality from their decision-making.

    Jm: The judging-methodical type are followers of process, preferring a rigid, structured and ordered approach. This can mean that they oppose more chaotic or spontaneous approaches.


Summary: ISTJ Subtypes

Subtypes: Dichotomies within dichotomies

Research shows that the traditional four dichotomies are in fact multidimensional and nuanced, displaying at least two distinct variants which we call subtypes. The addition of subtypes provides a richer and more accurate picture of an individual's personality, while retaining the many advantages of the simple 16 type model as used in the MBTI Test. By understanding your subtype, you learn about the behavioral styles which separate you from others who share your overall type.

 


grey avatar

Ellie Simmonds, MSc

University of Bath, Psychology

Ellie Simmonds, MSc in Psychology from University of Bath. Ellie is an associate lecturer on psychometric assessments and has extensive knowledge of the 16-type model.