Scale Overview
The Humanmetrics Jung Typology Test (JTT) was developed by Humanmetrics (1998). It is designed to measure Jungian Personality Type. The scale is intended for use with Adults.
Scale Structure
This instrument consists of 64 items organized into 4 factors/subscales: Extraversion – Introversion, Sensing – Intuition, Thinking – Feeling, Judging – Perceiving.
| Factor / Subscale |
Items |
N |
| Extraversion – Introversion |
2,3,5,9,17,20,23,26,27,31,32,36,37,41,46,49,51,54,56,61 |
20 |
| Sensing – Intuition |
7,11,13,14,22,25,28,33,38,42,48,50,52,57,59,60,64 |
17 |
| Thinking – Feeling |
4,6,10,15,19,29,30,35,39,43,53,58,63 |
13 |
| Judging – Perceiving |
1,8,12,16,18,21,24,34,40,44,45,47,55,62 |
14 |
Response Format
Respondents rate each item using a custom response format.
Response anchors: 5 = YES, 4 = yes, 3 = uncertain, 2 = no, 1 = NO.
The scale includes 33 reverse-scored items to reduce acquiescence bias.
Scoring
Items are scored by subscale, with each subscale sum representing a distinct dimension.
Total scores range from 0 to 100. Interpretation guidelines:
- Preference strength percentage for each dichotomy (E vs I, S vs N, T vs F, J vs P): 0 – 100
Psychometric Properties
Internal Consistency: The scale has demonstrated good to excellent internal consistency with reported Cronbach’s alpha values of Cronbach's alpha typically ranges from 0.70 to 0.85 across subscales.
Administration
The scale is self-administered and typically takes approximately 15 minutes to complete. It can be administered individually or in group settings. No special training is required for administration.