Dr. Luc Beaudoin Sleep Science

Cognitive Shuffle: Sleep Technique for a Busy Mind

Picture a series of random, neutral things to give a busy mind something calm to do at bedtime. Press “Shuffle Next Word” for new prompts.

"BEDTIME"

Think of words starting with B: Balloon 🎈, Bicycle 🚲, Butterfly 🦋, Bookshelf 📚... Spend a few seconds picturing each one.

🌿 Note: Serial Diverse Imagining is a cognitive science sleep technique developed at Simon Fraser University.

How to do the cognitive shuffle

  1. Get comfortable in bed with the lights off and choose a simple word with no emotional meaning, such as “BEDTIME”.
  2. Take the first letter (B) and think of a word that starts with it — “balloon” — then picture it for 5 to 10 seconds.
  3. Think of another, unrelated B word — “bicycle” — and picture that. Keep going until you run out, then move to the next letter.
  4. If a worry pulls you back, notice it and simply move on to the next word. There is no need to finish the whole word.

Choose ordinary, emotionally neutral objects and keep them unrelated to each other, so they don’t turn into a story.

Why it may help

The cognitive shuffle was developed by cognitive scientist Luc Beaudoin at Simon Fraser University, who calls it “serial diverse imagining”. As we drift off, our thoughts naturally become random and disconnected. Deliberately imagining unrelated, neutral objects may mimic that state and leave less room for worry and problem-solving.

Research so far is small, and the technique doesn’t work for everyone, but it is low-risk and easy to try as an alternative to counting sheep.

Safety: when to stop or get help

This is a low-risk technique. If you regularly struggle to sleep for three months or longer, or poor sleep is affecting your daytime life, speak to your doctor. Cognitive behavioural therapy for insomnia (CBT-I) is the recommended first treatment for long-term insomnia.

Frequently asked questions

Does the cognitive shuffle really work?

Some people find it helps them fall asleep faster. Evidence so far comes from small studies and user reports, so it is worth trying rather than guaranteed.

Why use random words?

Unrelated, neutral images are hard to link into a worry story, which gives an over-active mind something calm to do.

What if I start worrying again?

That is normal. Notice it and move to the next word. If worries keep coming back, try a quick brain dump first.

Can I use it if I wake up at 3am?

Yes. It can be used whenever you are lying awake, including after waking in the night.

Related tools and support

Written by Sudarshana, founder of InnerCalmGuide · Reviewed October 18, 2026 · Editorial policy. Self-help information, not medical advice.

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