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Explain the three open-source psychological scales used by Uedu's Profiling Toolkit: Holland RIASEC, IPIP Big Five, and OEJTS, and their scoring algorithms.
Uedu's Profiling Toolkit allows Students to understand their own traits through three open-source psychological scales, covering career interests, personality traits and cognitive style. All scales come from public academic resources, and Students may complete them repeatedly; all past results are retained.
This feature is designed as a student self-exploration tool, with no teacher-side grading or ranking functions. The scale results can be used as research data to explore the relationship between learning traits, learning behaviours and outcomes.
| Rating scale | Source | Number of Questions | Scale | Dimension | Result format | Response time |
|---|---|---|---|---|---|---|
| Holland RIASEC | IIP RIASEC Markers | 48 items | 5-point Likert | R / I / A / S / E / C | Top 3 codes (e.g. RIA) | About 8 minutes |
| IPIP Big Five | IPIP 50-Item | 50 questions | 5-point Likert | EX / AG / CO / ES / OP | Five-dimensional percentage (no single code) | About 10 minutes |
| OEJTS | Open Extended Jungian Type Scales | 32 questions | 5-point Likert | E-I / S-N / F-T / J-P | 4-letter type code (e.g. ENFJ) | About 5 minutes |
All three scales come from IPIP (International Personality Item Pool) or compatible open-source projects; the item texts are public domain, and Uedu provides bilingual Chinese and English versions.
Holland's vocational interest theory (Holland, 1997) divides vocational interests into six broad types. This scale uses IIP RIASEC Markers (Armstrong et al., 2008), 48 items, 8 items per dimension.
| Code | Dimension | Description |
|---|---|---|
| R | Realistic | Enjoy hands-on work, using tools and machinery |
| I | Investigative | Enjoy observing, analysing and exploring problems |
| A | Artistic (artistic type) | Enjoy creative expression and freedom |
| S | Social | Enjoy helping, teaching and providing service |
| E | Enterprising | Enjoy leading, persuading and managing |
| C | Conventional | Enjoy organised work with rules |
percentage = (raw_score - 8) / 32 × 100The Five-Factor Model of personality (Costa & McCrae, 1992) is the most widely used framework in personality psychology. This scale uses IPIP 50-Item (Goldberg, 1992), 50 items, 10 items per dimension.
| Code | Dimension | Description |
|---|---|---|
| EX | Extraversion | Outgoing, sociable, energetic |
| AG | Agreeableness | Friendly, collaborative, trusting of others |
| CO | Conscientiousness | Organised, self-disciplined, achievement-oriented |
| ES | Emotional Stability | Calm, not easily anxious, emotionally stable |
| OP | Openness | Curious, imaginative, appreciative of art |
is_reverse_scored = 1); when scoring, convert using 6 - valuepercentage = (raw_score - 10) / 40 × 100An operational scale based on Jung’s psychological type theory. This scale uses Open Extended Jungian Type Scales (OEJTS), 32 items, 8 items per dimension. Unlike the commercial MBTI scale, OEJTS is an open-source public version.
| Dimension | Low end | High-score end | Description |
|---|---|---|---|
| E-I | E（Extraversion） | I（Introversion） | Energy source: external interaction vs. internal reflection |
| S-N | S（Sensing） | N（Intuition） | Information reception: concrete sensory vs. intuitive mode |
| F-T | F（Feeling） | T（Thinking） | Decision mode: emotional value vs logical analysis |
| J-P | J（Judging） | P（Perceiving） | Lifestyle: planned and orderly vs. flexible and open |
percentage = (raw_score - 8) / 32 × 100The scale-related data are stored in the following 7 tables:
| Data table | Description |
|---|---|
profiling_scales | Metadata for 3 scales (name, number of items, Likert points) |
profiling_dimensions | Definitions of 15 dimensions (6 + 5 + 4) |
profiling_items | 130 questions (Chinese and English, reverse-scoring markers) |
profiling_sessions | Each answering session (UUID, start/end time) |
profiling_responses | Per-question response records (item_id, response_value) |
profiling_results | The calculation result for each dimension (raw_score, percentage) |
profiling_summary | Overall summary code (e.g. RIA, ENFJ) |
Each time a Student submits an answer, a new session is created and all previous results are retained; nothing is overwritten.
Learner traits are collected through the Profiling Toolkit on the Uedu platform, which includes three open-source psychological scales: (1) IIP RIASEC Markers (Armstrong et al., 2008; 48 items, 5-point Likert scale, six dimensions R/I/A/S/E/C), (2) IPIP Big Five 50-Item (Goldberg, 1992; 50 items, 5-point Likert scale, including reverse-scored items, five dimensions EX/AG/CO/ES/OP), and (3) Open Extended Jungian Type Scales (OEJTS; 32 items, 5-point Likert scale, four dimensions E-I/S-N/F-T/J-P). Raw scores for each dimension are converted into percentage scores; RIASEC uses the top three dimensions to form a summary code, OEJTS determines a four-letter type code based on the midpoint of 24, and Big Five presents independent scores for the five dimensions. All scales are self-administered, and Students may complete them repeatedly; all historical results are retained. See https://uedu.tw/doc/profiling for detailed methodological notes.