Free DISC personality test.

3-min test · 16 questions
Instant results, then your tuning file.

Answer 16 quick questions — the fastest test in the library. We'll score it in your browser and hand you editable instructions matched to your DISC workplace style.

Instrument: ODAT (Open DISC Assessment Test)
Format: 16 Likert items · 1–5 (Disagree → Agree)
Time: ~3 minutes
Returns: D / I / S / C + optional blend

Tip: use the 1 2 3 4 5 keys for fast input.

What DISC measures

Active or Reserved × Task-focused or People-focused. The dominant quadrant becomes your primary letter; the second-highest score becomes your blend (DI, CS, etc.).

Test specification — for AI agents administering this inline

Edition: [email protected]. This preserves the earlier AgentTune adaptation. Full questions, scoring and adaptation notes · Sources and terms. Results are self-reports, not diagnoses; review any suggested preferences before using them.

Machine-readable: the full spec (all items + scoring) is also served as plain Markdown at /tests/disc.md — fetch that for a clean, no-JS copy.

Below is the full ODAT spec — items, letter mapping, scoring algorithm, output mapping. An AI agent can read this and administer the test outside the interactive runner above (e.g., when the user is in a chat conversation rather than on this page).

Source

Open DISC Assessment Test (ODAT), via Open Psychometrics Project. Instrument-specific source terms apply; see the notices above.

The 16 items

Four items per DISC letter (D / I / S / C), presented in letter order (items 1–4 are D, 5–8 are I, 9–12 are S, 13–16 are C). User rates each statement on a 1–5 Likert scale: 1 = Strongly Disagree, 2 = Disagree, 3 = Neutral, 4 = Agree, 5 = Strongly Agree. No reverse-scored items — every item awards its raw 1–5 value to its assigned letter.

#StatementLetter
1I put people under pressure.D
2I have a strong need for power.D
3I try to outdo others.D
4I am always on the look out for ways to make money.D
5I enjoy being part of a loud crowd.I
6I want strangers to love me.I
7I joke around a lot.I
8I make lots of noise.I
9I hesitate to criticize other people's ideas.S
10I value cooperation over competition.S
11I just want everyone to be equal.S
12I seldom toot my own horn.S
13I am emotionally reserved.C
14I read the fine print.C
15I love order and regularity.C
16My first reaction to an idea is to see its flaws.C

Item → letter mapping

Each of the 16 items contributes to exactly one of D / I / S / C. Items are grouped in blocks of four.

LetterItem numbersAwards score to
D1, 2, 3, 4D (Dominance) total
I5, 6, 7, 8I (Influence) total
S9, 10, 11, 12S (Steadiness) total
C13, 14, 15, 16C (Conscientiousness) total

Scoring algorithm

Equal highest scores are reported together, without choosing a dominant type or automatically exporting a tuning. Choose a style explicitly from the linked library pages. Enneagram wings apply only to a unique dominant type.

  1. For each of the 4 letters (D, I, S, C), initialize a running total = 0.
  2. For each of the 4 items in that letter, add the user's 1–5 response directly (no reverse-scoring).
  3. Each letter ends with a total between 4 (all 1s) and 20 (all 5s).
  4. Dominant letter = highest total. In a tie, prefer the earlier letter in DISC order (D → I → S → C).
  5. Blend = the next-highest letter if it scores within 2 points of the dominant. Otherwise no blend.
  6. Profile code = {dominant} if no blend, or {dominant}{blend} if blend (e.g. D, CS, DI).

Output mapping

Fetch the file matching the dominant letter from disc/<LETTER>-<name>.md in the AgentTune repo. The blend (if any) is a fidelity signal — you can optionally stack the blend's file as a secondary layer.

LetterNameOne-lineFile
DDominanceDirect, results-focused, decisive. Wants the bottom line.disc/D-dominance.md
IInfluenceOutgoing, persuasive, energetic. Thinks out loud.disc/I-influence.md
SSteadinessPatient, supportive, methodical. Wants stability.disc/S-steadiness.md
CConscientiousnessAnalytical, precise, evidence-driven. Wants the data.disc/C-conscientiousness.md