Cognitive Shuffle
A drug-free way to fall asleep faster: let a stream of random, unrelated words drift past and picture each for a moment. This "serial diverse imagining" crowds out the worry-loops that keep you awake — mimicking how the mind naturally drifts into sleep.
Voice playback isn’t supported in this browser — words show on screen.
Lie down with the screen dimmed and the volume low. Picture each word for a second — no effort, no story — then let it go. If your mind drifts back to your day, just return to the next word. Educational sleep aid, not a treatment for clinical insomnia; see a clinician if sleep problems persist.
Sources & methodology
Cognitive shuffling — formally "serial diverse imagining" — was developed by cognitive scientist Luc Beaudoin (Simon Fraser University). The idea: deliberately imagining a stream of random, unrelated, concrete objects mimics the loose imagery the brain drifts through just before sleep, and blocks the coherent worry-loops and planning that keep cognitive arousal high. Evidence is still early: the student studies of the technique were reported at conferences, and we could not find them in a peer-reviewed journal, so treat it as a plausible, untested-at-scale idea rather than a proven treatment. It is free, drug-free and very low-risk. This player presents one neutral word every few seconds; picture each one briefly, without forcing it, and let your attention wander. It is a sleep aid, not a treatment for clinical insomnia — see a clinician if sleep problems persist.
- [1] Beaudoin LP, Lemyre A, Pudlo M, Bastien C (2019). Towards an integrative design-oriented theory of sleep-onset and insomnolence from which a new cognitive treatment for insomnolence (serial diverse kinesthetic imagining, a form of cognitive shuffling) is proposed for experimentally testing this against alternatives. Sleep Medicine 64 (Suppl 1): S29 (conference abstract).
Theory behind the cognitive shuffle / serial diverse imagining and its sleep-onset rationale, from the technique’s originator. A proposal for testing, not a trial result.
Common questions
What is cognitive shuffling?
Cognitive shuffling (or "serial diverse imagining") is a bedtime mental exercise: you picture a series of random, unrelated, concrete objects — mushroom, fence, telescope — for a moment each. The disconnected imagery resembles what your brain naturally does as it falls asleep, and it interrupts the runaway thinking and worrying that keep you awake.
Does cognitive shuffling actually work?
It is not proven yet. The idea has a clear rationale, and the originator’s student studies were reported at conferences, but we could not find them published in a peer-reviewed journal, so there is no solid trial evidence either way. It is not a cure for clinical insomnia, but it is free, drug-free and very low-risk to try.
How do I use this tool?
Lie down comfortably with the screen dimmed, press start, and let the words come one at a time. Picture each word for a second or two — no effort, no story, no judging — then let it go as the next appears. If your mind wanders back to your worries, just return to the next word. Many people drift off before the list runs long.
Why random, neutral words instead of relaxing imagery?
Guided relaxation, "sleep journeys" and structured visualisation still require focused attention and a coherent thread — which keeps part of the mind engaged. Random, unconnected words do the opposite: they give the mind something harmless and incoherent to chew on, closer to the fragmented imagery of sleep onset, so it can let go rather than lock onto a thought.
Where does this technique come from?
It was developed by cognitive scientist Luc Beaudoin at Simon Fraser University, who described "serial diverse imagining" and the "cognitive shuffle" in conference papers from 2014 onwards. The citation is in the Sources section on this page.