The Cognitive Shuffle: How to Do It and Does It Help You Sleep?
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The cognitive shuffle is a mental trick for falling asleep: you picture a string of random, unrelated things so your mind can't settle back into worrying or planning. It was developed by cognitive scientist Luc Beaudoin and has spread widely on social media as a way to switch off a busy brain. This guide covers what the cognitive shuffle is, how to do it step by step, the theory behind it, what the evidence does and doesn't show, and when a busy mind at night needs more than a trick.
The short answer: the cognitive shuffle (also called serial diverse imagining) means choosing a neutral word, then for each letter thinking of words that start with it and briefly picturing each one. The idea is that random, unconnected images crowd out worry and resemble the drifting thoughts that come before sleep. The theory hasn't been tested in large published trials, but older research found imagery-based distraction helped people with insomnia fall asleep faster. It's free and harmless to try, but persistent insomnia needs proper treatment.
What the cognitive shuffle is
When you lie awake, your thoughts often stay organised: replaying the day, rehearsing tomorrow, or worrying about not sleeping. The cognitive shuffle tries to scramble that.
Luc Beaudoin, who started the app company CogSci Apps, proposed the method as "serial diverse imagining". His theory sorts bedtime thinking into types (source):
- Thinking that keeps you awake, such as planning, problem-solving, and thinking about sleep and its consequences.
- Thinking that goes with sleep onset, which tends to be disorganised, with brief dream-like images and scattered memories.
The shuffle is meant to do both jobs at once: block the worry and mimic the jumbled thinking that comes before sleep. His company sells an app version, but you don't need it.
How to do the cognitive shuffle
This is the do-it-yourself version, based on the developer's own instructions (source):
- Get into bed ready to sleep. Lights off, phone away.
- Choose a seed word. Pick a random, emotionally neutral word of at least five letters, without lots of repeated letters. For example, "PLANET".
- Start with the first letter. Think of a word beginning with P, such as "pencil".
- Picture it for a few seconds. Imagine a pencil, then let it go.
- Think of another P word and picture that. Piano. Parrot. Pillow. Keep going.
- Move on when you're bored or run out of ideas, to the next letter: L.
- Start a new seed word if you reach the end and are still awake.
Tips that make it work better
| Do | Avoid |
|---|---|
| Pick words you can picture easily | Abstract words like "justice" |
| Keep items unrelated | Themes, such as only foods or only animals |
| Use neutral, boring words | Anything tied to work, money or relationships |
| Let images be brief | Building detailed stories |
| Stay relaxed if it doesn't work fast | Checking the clock |
The developer suggests skipping words that form a theme with the ones before, because themes pull your mind back into organised thinking. If you get stuck on a letter, add a second letter (for example "ED" instead of "E") to open new options.
What the evidence says
The shuffle itself. The developer's site describes its theory as speculative and doesn't cite published trials of the technique (source). So the specific method hasn't been proven in large studies.
Imagery distraction more broadly. A 2002 study by Harvey and Payne in Behaviour Research and Therapy gave 41 people with insomnia either imagery distraction instructions, general distraction instructions or no instructions. The imagery group fell asleep faster and reported fewer and less distressing unwanted thoughts before sleep. The authors suggested imagery takes up enough mental space to stop you re-engaging with worries. That's the closest research support for the shuffle's core idea.
Where it sits in Australian advice. The Sleep Health Foundation lists visual imagery, along with mindful breathing and progressive muscle relaxation, as part of relaxation training in CBT for insomnia (source). The Better Health Channel also suggests visualising a peaceful scene and warns that watching the minutes tick by keeps you awake (source).
Who it suits, and who needs more
The cognitive shuffle suits people whose main problem is a mind that won't stop. If your body feels tense, pair it with muscle relaxation or 4-7-8 breathing. If a specific worry keeps coming back, writing it down earlier in the evening may help more. See racing thoughts at night and anxiety and sleep.
If you've been lying awake a long time, the shuffle shouldn't become a battle. Get up, do something calm in dim light, and return to bed when you feel sleepy. For more general strategies, see how to fall asleep faster.
When to see your GP
See your GP if trouble falling asleep happens three or more nights a week for months, if you feel unwell or very sleepy during the day, or if worry, low mood or anxiety are keeping you up. Your GP can refer you for CBT-I, the recommended treatment for persistent insomnia. If you're struggling, Beyond Blue and Lifeline (13 11 14) can help. This guide is general information, not medical advice.
Where the Sovune Nudge fits
We make the Sovune Nudge, a vibrating alarm wristband, so we're not neutral. A busy mind at night often includes "what if I sleep through my alarm?" Having a reliable wake-up you've already set can take one worry off the list.
- Set on the band itself. No app, no phone and no Bluetooth, so your phone can stay out of the bedroom.
- Each alarm runs for a full minute, getting stronger as it goes, and you can switch it off sooner.
- Three separate alarms if you want a backup.
- Silent, with no light in the room except a small display when you press the button, so there's no glowing clock to watch.
It comes with a 30-day money-back guarantee.
Quick answers
What is the cognitive shuffle? A sleep technique where you picture a series of random, unrelated things, usually by thinking of words that start with each letter of a chosen word.
Does the cognitive shuffle actually work? The specific method hasn't been tested in large published trials, but research on imagery distraction found it helped people with insomnia fall asleep faster.
How long should I picture each word? Just a few seconds. Keep images brief and move on.
What if I'm still awake after ten minutes? Don't force it. If you've been awake a long while, get up for a bit and return to bed when sleepy.
For every type of silent alarm compared, see our complete guide to vibrating alarms in Australia.