Test Methodology
Understanding the theory and calculation behind your personality type
Last updated: December 17, 2025
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.
The OEJTS measures personality across four dimensions derived from Carl Jung's theory of psychological types, later popularized by the Myers-Briggs Type Indicator (MBTI). Our implementation provides a free, transparent, and scientifically-grounded assessment.
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 innate 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)
These preferences combine to form 16 distinct personality types, each with characteristic patterns of behavior, motivation, and interaction.
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 converted to percentages to show the strength of each preference:
Percentage = ((Raw Score - 8) / 32) × 100 For example, a raw EI score of 18 gives: ((18-8)/32)×100 = 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. (1921). Psychological Types. Princeton University Press.
- Myers, I.B. & Myers, P.B. (1995). Gifts Differing: Understanding Personality Type. Davies-Black Publishing.
- Open Extended Jungian Type Scales (OEJTS) — Open Psychometrics