Are you familiar with 16personalities?
It’s an extremely popular personality assessment tool worldwide that you can use for free and easily.
But you might wonder about various things like: Do personality tests really work? Are they reliable?
Actually, there hasn’t been sufficient research on 16personalities yet. Compared to other personality assessments, not many academic papers have been published, so the relationship between personality types and actual behavior isn’t clearly understood either.
Therefore, we need to be careful not to take the diagnostic results too literally.
However, it can serve as a starting point for understanding yourself and others, and it can also provide hints for improving communication.
Let’s think about the benefits and challenges together!
Once again, personality researcher and author of Villain Encyclopedia, Tokiwa (@etokiwa999), will provide the explanation.
※We have developed the HEXACO-JP Personality Assessment! It has more scientific basis than MBTI. Tap below for details.

※This article is based on “Our Theory” from the official English version of the 16personalities website.
目次
- 1 What is 16personalities?
- 1.1 Overview of 16personalities: A free personality assessment service
- 1.2 Development from Jungian Psychology and MBTI
- 1.3 Unique Framework Incorporating the Big Five Model
- 1.4 The Difference Between Type and Traits
- 1.5 A Popular Personality Test Translated into 30 Languages Worldwide and Taken Over 100 Million Times
- 2 16personalities Theory
- 3 16personalities Personality Types
- 4 Reliability and Validity of 16personalities
- 4.1 Importance of Reliability and Validity
- 4.2 Lack of Published Related Research Papers
- 4.3 The Need for Validity Verification Using Cronbach’s Alpha Coefficient
- 4.4 The Importance of Confirming Correlations Between Personality Assessment Results and Actual Behavior
- 4.5 The Necessity of Research on Relationships with Genetics and Brain Function
- 4.6 Academically Trusted Personality Assessment: Big Five
- 4.7 Academically Trusted Personality Assessment: HEXACO Model
- 5 How to Use 16personalities and Precautions
- 6 Summary: The Potential and Challenges of 16personalities
What is 16personalities?
Overview of 16personalities: A free personality assessment service
It adopts a unique framework that starts with psychologist Carl Jung’s theory while also incorporating modern psychological theories.
Specifically, it has the following characteristics:
- Diagnoses personality based on 5 personality traits
- Classifies into 16 personality types
- Broadly categorized into 4 groups
It’s characterized by easy-to-understand explanations that modernize Jung’s theory, and is supported by many users.
It can be said to be a service aimed at deepening understanding of personality and connecting it to improved self-awareness and interpersonal relationships.
Development from Jungian Psychology and MBTI
The theoretical background of 16personalities lies in psychologist Carl Gustav Jung’s theory.
Jung proposed concepts such as extraversion and introversion, thinking and feeling, and laid the foundation for personality typology.
Later, Jung’s theory was developed by American psychologists, the mother-daughter team Myers-Briggs, giving birth to the personality assessment tool known as MBTI (Myers-Briggs Type Indicator).
MBTI classifies personality into 16 types based on the following 4 indicators:
- Extraversion – Introversion
- Sensing – iNtuition
- Thinking – Feeling
- Judging – Perceiving
16personalities developed into its own unique theory while being based on Jungian psychology and MBTI.
By reinterpreting Jung’s insights in a modern way and expanding on MBTI’s framework, it aims to be a more understandable and practical personality assessment tool.
In other words, while 16personalities is sometimes called “MBTI assessment,” it is not “MBTI”.
Unique Framework Incorporating the Big Five Model
16personalities adopts a unique framework that incorporates the Big Five model (Big Five personality traits).
The Big Five model is a personality trait theory widely supported in modern psychology that captures personality through the following 5 traits:
- Extraversion
- Agreeableness
- Conscientiousness
- Neuroticism
- Openness to Experience
16personalities reconstructed this Big Five model and defined its own 5 traits.
Specifically, it added the Assertive-Turbulent indicator in addition to MBTI’s 4 indicators.
This makes it possible to capture personality in a more multifaceted way.
By incorporating the Big Five model, 16personalities aims to be a personality assessment with academic backing.
It can be said to be a unique framework that reflects the latest findings in personality psychology while also pursuing practicality.
The Difference Between Type and Traits
The major difference between 16personalities and the Big Five model lies in how they handle Types and Traits.
16personalities takes an approach that classifies personality into 16 types.
Each type is defined by a combination of 5 trait dimensions, and individuals are classified into one of these types.
On the other hand, the Big Five model takes an approach that views personality as a combination of 5 traits.
Each trait is measured on a continuous dimension, and individuals are considered to have varying degrees of each trait.
In this way, 16personalities emphasizes types, while the Big Five model emphasizes traits.
By understanding the difference between types and traits, we can compare and examine the differences in their views of personality.
A Popular Personality Test Translated into 30 Languages Worldwide and Taken Over 100 Million Times
16personalities is a personality testing service that has gained tremendous popularity worldwide.
It has currently been translated into over 30 languages and is used globally.
It is reported that the test has been taken over 100 million times worldwide.
This number demonstrates the high popularity of 16personalities.
The reasons for its popularity include the following points:
- The convenience of being available for free
- Original theory combining Jungian psychology and the Big Five model
- Easy-to-understand explanations and practical advice
Multi-language support, making it accessible to users worldwide, is also one of its attractions.
16personalities has been supported by many people who want to deepen their self-understanding and understanding of others through personality testing, growing into a global service.
It is expected to continue contributing to even more users through further language support and theoretical improvements.
16personalities Theory
5 Personality Traits and 2 Poles
16personalities views personality through 5 traits.
These 5 traits are each expressed by 2 opposite poles.
- Mind: Introverted – Extraverted
- Energy: Observant – Intuitive
- Nature: Thinking – Feeling
- Tactics: Judging – Prospecting
- Identity: Assertive – Turbulent
These traits represent different aspects of personality.
For example, Mind represents social orientation, Energy represents how information is gathered, and Nature represents the basis for decision-making.
By diagnosing which tendency an individual has in each trait, the overall picture of their personality becomes clear.
In this way, 16personalities provides a framework for understanding personality from multiple perspectives.
By viewing each aspect of personality as a continuum, more nuanced and realistic personality understanding becomes possible.
About Mind: Introversion and Extraversion
Mind is a trait that represents the direction of social energy.
Introverted people tend to direct their energy inward and prefer time alone.
On the other hand, Extraverted people tend to direct their energy toward the external world and prefer social activities.
The Mind trait influences the following behaviors and tendencies:
- Sociability: Introverted people are quiet and reserved, extraverted people are active and outgoing
- Source of energy: Introverted people recharge energy through alone time, extraverted people gain energy through socializing
- Thinking style: Introverted people are introspective and cautious, extraverted people are expansive and improvisational
However, introversion and extraversion are opposite poles, and most people are positioned somewhere in between.
People who are completely introverted or extraverted are in the minority, and most people behave both introvertedly and extravertedly depending on the situation.
※For MBTI, the difference between E and I is introduced here.
About Energy: Observant and Intuitive
Energy is a trait that represents how information is gathered and how the world is viewed.
Observant people value concrete information obtained through the five senses and tend to be practical and reality-oriented.
On the other hand, Intuitive people focus on patterns and possibilities, and tend to be abstract and theory-oriented.
Energy characteristics influence the following behaviors and tendencies:
- Information gathering: Realistic people prefer detailed and concrete information, intuitive people prefer general and abstract information
- Problem solving: Realistic people take a practical and step-by-step approach, intuitive people take an innovative and holistic approach
- Interests: Realistic people are interested in the present and practicality, intuitive people are interested in the future and possibilities
However, realistic and intuitive are also polar opposites, and most people are positioned somewhere in between.
They can process information both realistically and intuitively depending on the situation.
※In the case of MBTI, the differences between S and N are introduced here.
About Nature: Logical and Emotional
Nature is a characteristic that represents decision-making criteria and values.
Thinking people tend to make judgments based on objective facts and rationality.
On the other hand, Feeling people tend to make judgments based on subjective values and interpersonal relationships.
Nature characteristics influence the following behaviors and tendencies:
- Decision making: Logical people value calm and objective analysis, emotional people value empathy and harmony
- Communication: Logical people are straightforward and prefer debate, emotional people are indirect and prefer empathy
- Values: Logical people value fairness and rationality, emotional people value compassion and human relationships
However, logical and emotional are also polar opposites, and most people are positioned somewhere in between.
They can make both logical and emotional judgments depending on the situation.
※In the case of MBTI, the differences between T and F are introduced here.
About Tactics: Planned and Exploratory
Tactics is a characteristic that represents behavioral style and approach to things.
Judging people tend to like organizing things and proceeding according to plan.
On the other hand, Prospecting people tend to like responding flexibly and exploring possibilities.
Tactics characteristics influence the following behaviors and tendencies:
- Behavioral style: Planned people are organized and steady, exploratory people are flexible and adaptive
- Goal setting: Planned people set clear goals and execute them, exploratory people have a general direction and explore
- Daily life: Planned people prefer a regular lifestyle, exploratory people prefer a free and changing lifestyle
However, planned and exploratory are also polar opposites, and most people are positioned somewhere in between.
They can act both in a planned and exploratory manner depending on the situation.
※In the case of MBTI, the differences between J and P are introduced here.
About Identity: Self-Confident and Self-Uncertain
Identity is a characteristic that represents self-perception and emotional stability.
Assertive people tend to be confident and emotionally stable.
On the other hand, Turbulent people tend to be self-critical and emotionally unstable.
Identity characteristics influence the following behaviors and tendencies:
- Self-evaluation: Self-confident people are satisfied with themselves, self-uncertain people tend to be dissatisfied with themselves
- Stress coping: Self-confident people are resistant to stress, self-uncertain people are vulnerable to stress
- Emotional expression: Self-confident people tend to suppress emotions, self-uncertain people tend to express emotions
However, self-confident and self-uncertain are also polar opposites, and most people are positioned somewhere in between.
Depending on the situation, people may feel confident or anxious.
By understanding Identity characteristics, you can grasp the emotional characteristics and behaviors of yourself and others.
By considering emotional differences, you can lead to better self-understanding and building interpersonal relationships.
16personalities Personality Types
The 16 Personality Types (16personalities) and Their Overview
16 personality types are defined based on combinations of five personality traits.
Each type is represented by the first letters of four traits and either A (Assertive) or T (Turbulent) representing self-confidence.
For example, the combination of Introverted (I), Intuitive (N), Feeling (F), Judging (J),
and Assertive (A) is represented as INFJ-A.
The 16 personality types are as follows:
- INTJ (Architect), INTP (Logician), ENTJ (Commander), ENTP (Debater)
- INFJ (Advocate), INFP (Mediator), ENFJ (Protagonist), ENFP (Campaigner)
- ISTJ (Logistician), ISFJ (Defender), ESTJ (Executive), ESFJ (Consul)
- ISTP (Virtuoso), ISFP (Adventurer), ESTP (Entrepreneur), ESFP (Entertainer)
Each type has an easy-to-understand name (in parentheses) that represents its characteristics.
For example, INTJ is called the “Architect” and represents a personality with strategic thinking and creativity.
16personalities provides detailed explanations for each personality type, including strengths, weaknesses, relationships, and career suitability.
By knowing your type, you can deepen your self-understanding and connect it to personal growth.
Additionally, by understanding others’ types, you can make communication and collaboration smoother.
16personalities’ Classification into Four Groups
16personalities broadly categorizes the 16 personality types into four groups.
This grouping focuses on commonalities between types.
The four groups are as follows:
- Analysts: INTJ, INTP, ENTJ, ENTP
- Diplomats: INFJ, INFP, ENFJ, ENFP
- Sentinels: ISTJ, ISFJ, ESTJ, ESFJ
- Explorers: ISTP, ISFP, ESTP, ESFP
Each group has the following characteristics:
- Analysts: Have strong intellectual curiosity and approach things logically and strategically
- Diplomats: Have insight and act idealistically and cooperatively
- Sentinels: Have a strong sense of responsibility and proceed realistically and organizationally
- Explorers: Have high adaptability and tackle problems practically and actively
Types within a group share basic tendencies and values, but also have individual characteristics.
By understanding group characteristics, you can grasp behavioral patterns and motivations of yourself and others from a broader perspective.
Additionally, by leveraging group diversity, you can enhance the effectiveness of teamwork and organizational management.
Characteristics of the Analyst Group
The Analyst group consists of people with strong intellectual curiosity who excel at logical and strategic thinking.
This group includes four types: INTJ (Architect), INTP (Logician), ENTJ (Commander), and ENTP (Debater).
The main characteristics of the Analyst group are as follows:
- Rationality: Making judgments based on objective facts and logic
- Strategic thinking: Seeking optimal solutions from a long-term perspective
- Independence: Valuing their own thoughts and acting autonomously
- Innovation: Not being bound by existing frameworks and generating new ideas
The Analyst group often excels in fields that require expertise and logical thinking abilities, such as science, technology, and management.
On the other hand, they may sometimes face challenges in emotional expression and interpersonal relationship skills.
By leveraging the strengths of the Analyst group while compensating for weaknesses, they can achieve higher results.
Additionally, by incorporating perspectives from other groups, they can lead to richer ideas and problem-solving.
Characteristics of the Diplomats Group
The Diplomats group consists of people with excellent intuition who act idealistically and cooperatively.
This group includes four types: INFJ (Advocate), INFP (Mediator), ENFJ (Protagonist), and ENFP (Campaigner).
The main characteristics of the Diplomats group are as follows:
- Empathy: Deeply understand others’ emotions and needs
- Idealism: Hold high ideals and act toward meaningful goals
- Creativity: Generate innovative ideas from unique perspectives
- Harmony: Avoid conflict and strive to build cooperative relationships
The Diplomats group often excels in fields that require humanity and creativity, such as education, counseling, and arts.
On the other hand, they may sometimes face challenges with realistic constraints and logical thinking.
By leveraging the strengths of the Diplomats group while compensating for weaknesses, they can exert greater influence.
Additionally, by incorporating perspectives from other groups, they can lead to more realistic and persuasive proposals.
Characteristics of the Sentinels Group
The Sentinels group consists of people with strong sense of responsibility who proceed with things realistically and systematically.
This group includes four types: ISTJ (Logistician), ISFJ (Protector), ESTJ (Executive), and ESFJ (Consul).
The main characteristics of the Sentinels group are as follows:
- Integrity: Faithfully fulfill duties and promises
- Reality-oriented: Make judgments based on concrete facts and experiences
- Organization: Systematically organize things and execute them steadily
- Service-oriented: Work hard for others and take on supportive roles
The Sentinels group often excels in fields that require reliability and dedication, such as administration, law, and healthcare.
On the other hand, they may sometimes face challenges in adapting to change and understanding abstract concepts.
By leveraging the strengths of the Sentinels group while compensating for weaknesses, they can achieve more stable and reliable results.
Additionally, by incorporating perspectives from other groups, they can lead to more flexible and innovative initiatives.
Characteristics of the Explorers Group
The Explorers group consists of people with high adaptability who tackle problems practically and actively.
This group includes four types: ISTP (Virtuoso), ISFP (Adventurer), ESTP (Entrepreneur), and ESFP (Entertainer).
The main characteristics of the Explorers group are as follows:
- Flexibility: Respond adaptively according to situations
- Realism: Value actual experiences and results
- Action-oriented: Quickly move to execution and repeat trial and error
- Originality: Approach problems with unconventional free thinking
The Explorers group often excels in fields that require mobility and originality, such as sports, art, and business.
On the other hand, they may sometimes face challenges with long-term planning and theoretical thinking.
By leveraging the strengths of the Explorers group while compensating for weaknesses, they can achieve greater results.
Additionally, by incorporating perspectives from other groups, they can lead to more strategic and sustainable activities.
Reliability and Validity of 16personalities
Importance of Reliability and Validity
In evaluating personality assessment tools, reliability and validity are extremely important indicators.
Reliability means that test results are consistent and have high reproducibility.
In other words, it questions whether the same person would get similar results when taking the test multiple times.
On the other hand, validity indicates whether a test can appropriately measure the concept it should be measuring.
For example, whether a personality assessment tool can truly measure personality becomes a matter of validity.
Tests with high reliability and validity have the following characteristics:
- Consistent results are obtained
- Can appropriately measure the concepts that should be measured
- Relationships with other indicators are theoretically supported
- High predictive power
Various statistical methods are used to verify the reliability and validity of personality assessment tools.
For example, reliability is evaluated through test-retest methods and internal consistency analysis, while validity is evaluated through factor analysis and examination of criterion-related validity.
Examining the reliability and validity of 16personalities is essential for evaluating its theoretical foundation.
Currently, it cannot be said that sufficient evidence has been accumulated. We will explain the reasons for this.
Lack of Published Related Research Papers
While 16personalities is a popular personality assessment tool, verification from an academic perspective is not sufficient.
Currently, the publication of peer-reviewed papers on 16personalities is limited.
Peer-reviewed papers refer to research papers that have undergone rigorous review by experts and have been published in academic journals.
The accumulation of peer-reviewed papers is an important indicator in evaluating academic credibility.
Regarding 16personalities, while research reports by the operating organization exist, the current situation is that verification by independent researchers is lacking.
In particular, academic support is required for the following points.
- Validity of the five trait axes
- Reliability of the 16 type classifications
- Relationship between diagnostic results and actual behavior
By clarifying these points, the theoretical foundation of 16personalities will become more solid.
It is expected that empirical examination by diverse researchers will advance in the future.
Given the current lack of academic support, it is wise to use 16personalities results as one piece of reference information rather than treating them as absolute.
The Need for Validity Verification Using Cronbach’s Alpha Coefficient
In evaluating the academic credibility of 16personalities, validity verification is essential.
Validity is an indicator that shows whether the concept to be measured can be appropriately measured.
One method for verifying the validity of personality assessment tools is Cronbach’s alpha coefficient.
Cronbach’s alpha coefficient is an indicator for evaluating the internal consistency of questionnaire items.
The more consistent the responses to questionnaire items assumed to measure the same trait, the higher the alpha coefficient becomes.
Generally, if the alpha coefficient is 0.7 or higher, internal consistency is judged to be high.
Regarding 16personalities, it cannot be said that validity verification results using Cronbach’s alpha coefficient are sufficiently published.
The following verifications are required in the future.
- Calculation of alpha coefficients for each of the five trait axes
- Examination of the validity of the 16 type classifications
- Confirmation of concurrent validity with other personality assessment tools
Through these verifications, it is expected that the validity of 16personalities will be empirically supported.
Given the current situation where validity has not been sufficiently verified, excessive generalization of 16personalities results should be avoided.
It is important to treat diagnostic results as hypotheses and utilize them while comparing with other information.
The Importance of Confirming Correlations Between Personality Assessment Results and Actual Behavior
In evaluating the usefulness of personality assessment tools, confirming the relationship between diagnostic results and actual behavior is important.
Regarding 16personalities, descriptions suggesting relationships between personality types and behavioral characteristics can be found.
For example, the INTJ type is said to excel in strategic thinking ability, and the ENFP type is said to have high creativity.
However, it is unclear whether these relationships are empirically supported.
To verify correlations between personality assessment results and behavior, the following research is required.
- Behavioral observation of people classified into specific personality types
- Analysis of relationships between personality types and outcome indicators such as occupation, academics, and interpersonal relationships
- Comparison of relationships between personality types and behavior across different cultural spheres
Through these verifications, it is expected that the predictive validity of 16personalities will become clear.
Predictive validity is an indicator showing the degree to which future behavior can be predicted based on diagnostic results.
The social usefulness of personality assessment tools can be said to depend on the level of predictive validity.
Currently, it cannot be said that the predictive validity of 16personalities has been sufficiently verified.
If there is a large discrepancy between diagnostic results and actual behavior, the significance of personality assessment would become limited.
In the future, it is hoped that the predictive validity of 16personalities will become clear through the advancement of behavioral data collection and analysis in various situations.
The Necessity of Research on Relationships with Genetics and Brain Function
It is believed that personality formation involves a complex interplay of genetic factors and environmental factors.
In recent years, research exploring the relationships between personality and genetics or brain function has been advancing.
For example, relationships between specific personality traits and genetic polymorphisms, as well as relationships between personality traits and brain structure and function, have been reported.
However, sufficient evidence has not been obtained regarding the relationship between 16personalities and genetics or brain function.
To clarify the biological foundation of 16personalities, the following types of research are needed:
- Examination of relationships between each trait of 16personalities and genetic polymorphisms
- Examination of relationships between each trait of 16personalities and brain structure and function
- Examination of relationships between developmental changes in each trait of 16personalities and genetics and brain function
Through these studies, it is expected that the biological validity of 16personalities will be clarified.
However, since environmental factors also play a major role in personality formation, personality cannot be explained by biological factors alone.
A comprehensive research approach that considers the interaction between genetics and environment will be required.
However, since evidence is currently scarce, careful interpretation is necessary.
※In the case of the Big Five and HEXACO models, relationships with genetics and the brain have been studied.
Academically Trusted Personality Assessment: Big Five
In the field of personality psychology, personality models such as the Big Five and HEXACO are widely supported academically.
These models have had their reliability and validity confirmed through the accumulation of many years of research as mentioned above.
The Big Five is a model that captures personality through the following five traits:
- Extraversion
- Agreeableness
- Conscientiousness
- Neuroticism
- Openness to Experience
These traits were discovered through factor analysis, and their reproducibility has been confirmed across various cultural spheres.
Furthermore, the Big Five traits have been proven to be related to behavior and various aspects of life, and have been shown to have high predictive power.
Academically Trusted Personality Assessment: HEXACO Model
On the other hand, HEXACO is a six-factor model that further develops the Big Five.
- Honesty-Humility
- Emotionality
- Extraversion
- Agreeableness
- Conscientiousness
- Openness to Experience
HEXACO aims to capture personality more comprehensively by adding aspects of personality that cannot be fully captured by the Big Five, particularly the dimension of Honesty-Humility.
These tools are created through statistical verification and can be said to have high academic reliability.
When evaluating relatively new personality assessment tools like 16personalities, comparative examination with established models like the Big Five and HEXACO becomes important.
How to Use 16personalities and Precautions
Free Personality Assessment Test
The 16personalities personality assessment test can be taken for free.
To take the test, you simply need to access the official website and answer the question items.
It takes about 10 minutes to complete the answers.
The test questions have the following characteristics:
- Two-choice format: Choose the option that applies to each question
- Situational settings: Questions that assume specific situations are included
- Behavioral tendencies: Questions that ask about actual behavior are included
The questions correspond to five trait axes (Mind, Energy, Nature, Tactics, Identity).
Several question items are prepared for each axis, and scores are calculated based on response patterns.
After completing the test, a results report is displayed.
The report contains the following information.
- Personality type: Classified as one of 16 types
- Five trait scores: Each axis score is shown as a percentage
- Type explanation: Features and tendencies of the personality type are explained in detail
The fact that it can be taken freely and easily can be said to be a major attraction of 16personalities.
However, caution is needed when interpreting test results.
The results are based solely on self-reporting and may change depending on the situation.
It is important to use it as reference information for self-understanding, not as an absolute diagnosis.
Number of Test Questions and Required Time
The 16personalities personality assessment test consists of 60 question items.
Each question item is formatted to choose the applicable option from two choices.
The test takes approximately 10 minutes.
However, due to individual differences, some variation in time may occur.
The question items correspond to the following five trait axes.
- Mind: Questions related to introversion-extroversion
- Energy: Questions related to realistic-intuitive
- Nature: Questions related to logical-emotional
- Tactics: Questions related to planning-exploring
- Identity: Questions related to self-confident-self-uncertain
About 10 question items are prepared for each axis.
Many of the question items assume everyday situations and are designed to be easy to answer.
However, in two-choice format questions, you may feel that neither choice applies.
In such cases, you are required to choose the one that applies more.
While 60 questions enable multifaceted understanding of personality, maintaining the respondent’s concentration is not easy.
When taking the test, it is important to respond honestly to your feelings in a relaxed state.
Rather than being conscious of correct answers or ideals, an attitude of examining yourself as you are is required.
How to Read and Use Diagnostic Results
16personalities diagnostic results can be used as clues to deepen self-understanding and understanding of others.
The diagnostic results report contains the following information.
- Personality type: Classified as one of 16 types
- Five trait scores: Scores for each axis of Mind, Energy, Nature, Tactics, Identity are shown as percentages
- Type explanation: Features and tendencies of the personality type are explained in detail
Using this information as clues, you can understand your personality traits from multiple perspectives.
Additionally, personality type explanations are helpful in knowing your strengths, weaknesses, and behavioral patterns.
However, diagnostic results are only reference information, not absolute standards.
Behavior changes depending on the situation, and individual differences are also significant.
Overgeneralizing or stereotyping diagnostic results should be avoided.
When using the results, it is important to keep the following points in mind.
- Use as clues for self-understanding
- Use as reference information for understanding others
- Apply to improve communication and collaboration
- Use as reference for stress management and decision-making
By deepening self-understanding and understanding of others, you can build better human relationships and improve performance.
Limitations and Precautions of Personality Assessment
Personality assessment is a useful tool for deepening self-understanding and understanding of others, but it is necessary to recognize that there are also limitations and precautions.
Personality assessment tools including 16personalities have the following limitations.
- Data based on self-reporting: Depends on the respondent’s subjectivity
- Situational dependency: Behavior changes depending on the situation
- Large individual differences: Even within the same type, individual differences are significant
- Developmental changes: Personality changes according to life stages
Considering these limitations, we should avoid over-generalizing or viewing personality assessment results as fixed.
Personality assessments are merely clues for self-understanding and understanding others, and do not deny human diversity.
An attitude that values individual dignity while flexibly utilizing assessment results is required.
Additionally, sufficient verification of the academic reliability and validity of personality assessment tools is necessary.
Currently, the academic foundation of 16personalities is limited, and further research accumulation is expected in the future.
By recognizing the limitations and precautions of personality assessments while utilizing them appropriately, we can deepen self-understanding and understanding of others, leading to better relationship building and performance improvement.
On the other hand, we must not forget to value daily communication rather than relying too heavily on personality assessments.
Summary: The Potential and Challenges of 16personalities
16personalities is a personality assessment tool that uniquely developed Jungian psychology and Big Five theory, gaining significant popularity worldwide.
However, 16personalities has the challenge of insufficient verification of academic reliability and validity.
Currently, related peer-reviewed papers are limited, and strengthening the theoretical foundation is required.
We should avoid treating assessment results as absolute or creating stereotypes.
Flexible utilization as reference information for self-understanding and understanding others is required.
16personalities is a tool with the potential to contribute to self-development and improvement of human relationships through personality understanding, but it also carries academic challenges.
While personality assessments are not omnipotent, when used skillfully, they should serve as an aid to deepen self-understanding and understanding of others, helping us walk a better path in life.

Writer & Supervisor: Eisuke Tokiwa
Personality Psychology Researcher / CEO, SUNBLAZE Inc.
As a child he experienced poverty, domestic abuse, bullying, truancy and dropping out of school — first-hand exposure to a range of social problems. He spent 10 years researching these issues and published Encyclopedia of Villains through Jiyukokuminsha. Since then he has independently researched the determinants of social problems and antisocial behavior (work, education, health, personality, genetics, region, etc.) and has published 2 peer-reviewed journal articles (Frontiers in Psychology, IEEE Access). His goal is to predict the occurrence of social problems. Spiky profile (WAIS-IV).
Expertise: Personality Psychology / Big Five / HEXACO / MBTI / Prediction of Social Problems
Researcher profiles: ORCID / Google Scholar / ResearchGate
Social & Books: X (@etokiwa999) / note / Amazon Author Page
