What does this experiment measure?

For each word the experiment records reaction time (ms from word appearance to first keystroke), total response time, number of erasures, and whether you changed your answer. These deviations from your own baseline are the signal. High latency on a specific word suggests the psyche is negotiating something — the stimulus has touched a complex.

What is the difference between the abridged and original test?

The abridged test uses 24 carefully selected stimulus words and takes about 5 minutes. The original test uses 100 stimulus words drawn from the full Jungian corpus and adds a recall round at the end — you are shown the 10 words that triggered your longest reaction times and asked to write what you originally typed. This recall failure is itself diagnostic. The original test takes around 30 minutes.

The Jung word association experiment

Q: What is the Jung word association experiment?

The word association experiment was developed by Carl Jung at the Burghölzli psychiatric clinic in Zurich and published in Studies in Word Association (1906). A stimulus word is read aloud; the subject responds with the first word that comes to mind. Abnormal reaction times — slowness, repetition, or unusual responses — signal what Jung called feeling-toned complexes: clusters of charged memories and emotions that resist normal association.

Q: What is a feeling-toned complex?

A feeling-toned complex, in Jungian psychology, is a cluster of associated ideas and memories held together by a common emotional charge — often unconscious. The word association experiment was designed to detect these complexes by revealing where the normally fluid flow of association hesitates, distorts, or breaks down entirely.

Q: What do I receive at the end?

After the test, an AI model analyses your reaction-time pattern, your responses, and any recall failures (in the original test). It returns a written reading identifying which stimulus words showed the most significant hesitation and what those clusters may suggest about active complexes in your psychology. The reading is specific to your data — not a generic personality type.

After Jung · Burghölzli, Zurich 1906

A word appears. You type the first word it brings to mind. Not the expected one — the one underneath. The test records not just what you wrote, but how long it took you to decide. Hesitation is the signal.

one word per stimulus · enter to continue

Abridged

5 minutes

24 words

Begin

Original

30 minutes

100 words
+ recall round

Begin

What is the word association experiment?

The experiment was developed by Carl Jung at the Burghölzli psychiatric clinic in Zurich and first published in Studies in Word Association (1906). A stimulus word is presented; the subject responds with the first word that comes to mind. The key measurement is not the response itself but the reaction time — the gap between presentation and first keystroke.

Abnormal delays, unusual responses, or self-corrections cluster around certain words. Jung called these clusters feeling-toned complexes: knots of charged memory and association, often unconscious, that disrupt the normal flow of thought. The longer the hesitation, the more loaded the stimulus.

What does the test actually measure?

For each of the stimulus words, the experiment silently records:

Reaction time — how long before you start typing
Total response time — how long the full answer takes
Erasures — whether you deleted and rewrote your answer
First draft — what you typed before erasing (if you did)
Keystroke count — a proxy for hesitation mid-word

These are compared across all your responses. Deviation from your own average — not a population norm — is the diagnostic signal. The test reads your pattern against itself.

What is a feeling-toned complex?

A feeling-toned complex, in Jungian psychology, is a constellation of ideas, memories, and images held together by a common emotional charge. It operates largely outside conscious awareness and surfaces indirectly — in dreams, slips, symptoms, and, as Jung showed, in abnormal reaction times on a word association test.

Complexes are not pathological in themselves. They are how the psyche organises experience around emotionally significant themes. The word association experiment reveals which themes carry the most charge.

— after C.G. Jung, Studies in Word Association, 1906

Abridged vs. original — what is the difference?

The abridged test uses 24 carefully selected stimulus words from the core Jungian set. It takes around 5 minutes and provides a focused reading on the most diagnostically reliable categories.

The original test uses all 100 stimulus words drawn from the full Jungian corpus, covering a wider range of themes — family roles, body, loss, moral categories, relational dynamics. It then adds a recall round: after the 100 words, you are shown the 10 that triggered your longest reaction times and asked to write what you think you typed the first time. Your ability or inability to recall your own responses is itself diagnostic.

What do I receive at the end?

Once you finish, the test sends your reaction-time pattern, responses, and recall data to an AI model trained to read this kind of data through a Jungian lens. It returns a written analysis — not a generic personality type, but a reading specific to your pattern: which words showed the most significant hesitation, what those clusters may suggest about active complexes, and what that might mean for your inner life.

No account is required. Your data is not stored after the analysis is returned.