Test Methodology
Understanding the theory and calculation behind your personality type
Last updated: September 18, 2026
About This Test
This test is based on the Open Extended Jungian Type Scales (OEJTS) 1.2, developed by Open Psychometrics. It is an open-source alternative to proprietary personality assessments.
OpenJung adapts the OEJTS questionnaire for self-reflection. Its implementation, quick version and translations do not yet have published project-specific validation.
Evidence and validation status
Traceable source: the full test adapts the 32-item OEJTS 1.2 by Open Psychometrics. The questionnaire PDF documents that version’s items, scoring rules and license. The development page provides item-selection background, not validation of this adaptation.
Not yet published: internal consistency, test–retest reliability and factor validation for this OpenJung version, its 8-question quick test, or its translations. We do not present unsupported reliability coefficients for this implementation.
Some wording and item directions have been adapted. The quick test uses only 2 questions per dimension; scaling it to 8–40 for display does not give it the precision of the full test. Percentages describe a position on a scale, not accuracy or diagnostic probability.
Use results for reflection and communication. Near-midpoint results do not establish a fixed type. Do not use them for hiring, clinical or other high-stakes decisions.
OEJTS questionnaire items and adaptations are licensed under CC BY-NC-SA 4.0, not public domain. The MIT license covers original OpenJung code, not the questionnaire.
Current assessment version: openjung-oejts-1
Sources and editorial scope
Questionnaire results
Scores summarize questionnaire answers. Percentages are scale positions, not accuracy or the probability of being a type. A type profile without scores is not a personal assessment.
OEJTS 1.2 questionnaire (PDF) Pages 1–3: license, 32 items and scoring rules for the source questionnaire. This is not a validation study of OpenJung, its quick test or translations.
OEJTS development “Item generation and evaluation” describes selection using self-identified types; “Versions and other downloads” links to version 1.2. This is development history, not validation of this adaptation.
Type theory
Type descriptions and cognitive-function order are interpretive frameworks. This questionnaire does not directly measure functions, abilities, maturity or relationship compatibility.
Myers & Briggs Foundation: type dynamics “Terminology of Type Dynamics” and “Order of the Mental Processes” explain terms in that framework. They do not verify this site’s individual trait claims or establish personal stress mechanisms.
Myers & Briggs Foundation: the processes of type dynamics “The Eight Dominant Processes” supports the eight card definitions as theory terminology only. “Tertiary Process (Third Process)” describes disagreement about its orientation. Neither validates OpenJung or the editorial examples and questions.
Optional practice
Career questions, stress prompts and small actions are editorial suggestions to try in a real situation. They are not measured findings about you, treatments or promises of improvement. Cat scenes are fictional illustrations.
Record updated:
The recorded edits and source checks were AI-assisted (Amp). No independent expert review is recorded; this date is not a certification date.
What was checked
The evidence-status note distinguishes source development from validation of OpenJung and separates questionnaire and code licenses. This record connects the cited source passages with those limited uses.
What remains unreviewed
The remaining theory explanations, calculation examples and translations have not all received a source-by-source review. No validation study of the current implementation, quick test or translations is established by this record.
GitHub issues are public. The draft includes only the public page, type and language—not scores, answers or private result links. Add only the relevant excerpt and source.
Jungian Psychology Foundation
In 1921, Swiss psychiatrist Carl Gustav Jung published "Psychological Types", introducing a framework for understanding personality differences. Jung proposed that people have characteristic preferences in how they:
- Direct their energy — toward the outer world (Extroversion) or inner world (Introversion)
- Take in information — through concrete senses (Sensing) or abstract patterns (Intuition)
- Make decisions — based on logic (Thinking) or values (Feeling)
- Organize their lives — through structure (Judging) or flexibility (Perceiving)
The later Myers-Briggs framework combined these four preference pairs into 16 types and wrote descriptions of each type's typical behavior, motivation, and ways of relating to others.
The Four Dimensions
Extroversion — Introversion
How you direct and receive energy
Extroversion (E)
- Energized by social interaction
- Think out loud, process externally
- Prefer breadth of experiences
- Action-oriented approach
Introversion (I)
- Energized by solitude and reflection
- Think before speaking, process internally
- Prefer depth of experiences
- Reflection-oriented approach
Sensing — Intuition
How you take in information
Sensing (S)
- Focus on concrete facts and details
- Trust direct experience
- Practical and realistic
- Present-focused
Intuition (N)
- Focus on patterns and possibilities
- Trust insights and hunches
- Imaginative and conceptual
- Future-focused
Thinking — Feeling
How you make decisions
Thinking (T)
- Decide based on logic and analysis
- Value fairness and consistency
- Objective and impersonal criteria
- Focus on cause and effect
Feeling (F)
- Decide based on values and impact
- Value harmony and compassion
- Subjective and personal criteria
- Focus on relationships
Judging — Perceiving
How you organize your world
Judging (J)
- Prefer structure and planning
- Like decisions to be made
- Organized and methodical
- Goal-oriented
Perceiving (P)
- Prefer flexibility and spontaneity
- Like options to stay open
- Adaptable and casual
- Process-oriented
Question Structure
The test consists of 32 questions, with 8 questions measuring each dimension. Each question presents a bipolar trait pair — two contrasting behavioral tendencies.
Example question (JP dimension):
You respond on a 5-point scale:
| Score | Meaning |
|---|---|
1 | Strongly agree with left trait |
2 | Somewhat agree with left trait |
3 | Neutral / No preference |
4 | Somewhat agree with right trait |
5 | Strongly agree with right trait |
Scoring Calculation
Step 1: Raw Score Calculation
For each dimension, we sum the answers to all 8 questions. Since each answer ranges from 1-5, the raw score for each dimension ranges from 8 to 40.
Raw Score = Sum of 8 answers (range: 8-40) Step 2: Type Determination
The midpoint of the scale is 24 (8 questions × 3 neutral). Scores above or below this threshold determine your preference:
| Dimension | Score ≤ 24 | Score > 24 |
|---|---|---|
| EI | Extroversion | Introversion |
| SN | Sensing | Intuition |
| TF | Feeling | Thinking |
| JP | Judging | Perceiving |
Step 3: Percentage Calculation
Raw scores are then converted to percentages that show where each score falls within the score range:
Percentage = ((Raw Score - 8) / 32) × 100 For example, a raw EI score of 18 gives ((18-8)/32)×100 ≈ 31, that is, 31% Introversion and 69% Extroversion.
Example Calculation
Let's walk through a complete example:
Raw Scores:
- EI:
18(≤24 → E) - SN:
30(>24 → N) - TF:
16(≤24 → F) - JP:
32(>24 → P)
Result:
Type: ENFP
Percentages:
- E: 69% / I: 31%
- S: 31% / N: 69%
- F: 75% / T: 25%
- J: 25% / P: 75%
Limitations & Considerations
- Not a diagnostic tool: This test is for educational and self-reflection purposes only. It should not be used for clinical diagnosis or high-stakes decisions.
- Preferences, not abilities: Your type reflects natural preferences, not fixed abilities. People can and do act outside their preferences.
- Context matters: Responses may vary based on mood, life circumstances, and how questions are interpreted.
- Not a complete picture: Personality is complex and multidimensional. No test captures its full richness.
- Cultural considerations: Personality expression varies across cultures. The test was developed in a Western context.
References
- Jung, C.G. (1971). Psychological Types (Collected Works, Vol. 6). Princeton University Press. (Original work published 1921)
- Myers, I.B. & Myers, P.B. (1995). Gifts Differing: Understanding Personality Type. Davies-Black Publishing.
- Open Extended Jungian Type Scales (OEJTS) — Open Psychometrics