Repeating a Word Can Make It Feel Like an Impostor

The Glitch

You know a word. You copy it again. Eventually it starts to feel peculiar—as if something ordinary has stopped belonging to your language.

That mismatch is an example of jamais vu: an experience feels unfamiliar even though you know it should be familiar. It is often described as the opposite of déjà vu, but reversing the label does not guarantee the same underlying mechanism.

A 2020 study by Chris Moulin and colleagues, published in Memory, brought the experience into a controlled task. This is older research revisited for a specific, reproducible question, not a newly discovered neurological condition.

The Experiment

Participants repeatedly copied words. They could stop when the task was complete, when something felt peculiar, or for another reason.

The authors report unusual subjective experiences in about two-thirds of participants, across about one-third of trials. The feeling typically appeared after roughly thirty repetitions, or a minute.

Those numbers describe different things. Two-thirds is the share of participants who reported the experience; one-third is the share of trials. Neither is a population-wide probability that any familiar word will suddenly become unrecognizable.

• The written material remained the same.
• Repetition changed how some participants reported experiencing it.
• The evidence came from those reports, not from a detector confirming that meaning had disappeared.

Knowing Without Familiarity

The experimentally induced experience was associated with reports of unfamiliarity outside the laboratory. But the study did not find the same pattern for every variable associated with déjà vu.

The authors reproduced known relationships between déjà vu, age and dissociative experiences; those relationships did not extend in the same way to the laboratory jamais vu measure. In daily life, people reporting more frequent déjà vu also reported more frequent jamais vu.

That combination is more informative than declaring the two experiences identical. They can be related while remaining distinguishable.

The Reality Check

This experiment does not show that a word literally leaves memory, that reality resets, or that ordinary repetition diagnoses an illness. It creates a reportable disturbance in the feeling of familiarity under particular task conditions.

JitterSnap’s interpretation: certainty about what something is and the feeling that it looks right are separable. Repetition can expose that gap without altering the object on the page.

The useful next question is what drives that separation and how closely a copying task matches spontaneous jamais vu. A laboratory analogue is a way into the mystery, not the last word on it.

The word stayed put. Its familiarity slipped.