What is the Cognitive Shuffle?
The Cognitive Shuffle is a simple sleep-onset technique developed by Dr. Luc P. Beaudoin, a cognitive scientist who studies the brain’s transition from wakefulness into sleep. Beaudoin first described the technique, which he originally termed serial diverse imagining, in a 2013 paper at Simon Fraser University. It was later brought to wider attention through the mySleepButton app, which guides users through the technique at bedtime.
The idea is straightforward: instead of lying in bed with an active, story-driven mind, clients deliberately fill their awareness with a quick, random stream of unrelated mental images. A cat. A cloud. A red door. None of it connects. None of it tells a story. That’s the point.
Rather than trying to suppress thoughts or force relaxation, both of which tend to backfire, the shuffle gives the mind something to do that is simply incompatible with organized worrying or planning.
Why it Works
The brain reads coherent, sequential thinking (reviewing the day, running through tomorrow’s list, replaying a conversation) as a signal that the person is still meaningfully engaged. So it stays awake. Random, disconnected images send the opposite signal. They mimic the natural fragmentation of thought that happens just before sleep, telling the brain it’s safe to let go.
The Research Behind it
Two bodies of research support the Cognitive Shuffle. The first is the cognitive arousal model of insomnia, which identifies organized, ruminative thinking as a primary reason people can’t fall asleep, not stress in general, but the specific pattern of purposeful, story-like mental activity. The second is research on the brain’s natural transition into sleep, which shows that thoughts become fragmented and random in the minutes before sleep onset. The shuffle borrows from this: by intentionally generating that randomness, it nudges the brain toward a state it was already heading toward.
A 2018 study by Scullin and colleagues found that writing a to-do list before bed (offloading mental “unfinished business”) helped people fall asleep faster. The Cognitive Shuffle works on a related principle: instead of resolving mental loops, it interrupts them before they can form.
The mySleepButton app, built on Beaudoin’s model and developed by his company, CogSci Apps Corp., delivered audio prompts every few seconds to guide users through random imagery at bedtime. Many users with chronic sleep-onset difficulty reported falling asleep faster, though large randomized trials are still limited.
A Note on the Evidence
The Cognitive Shuffle is mechanistically well-grounded and supported by converging evidence from cognitive arousal research, sleep neurophysiology, and clinical observation. Large-scale RCTs are still pending. It’s best understood as a low-risk, research-informed tool, appropriate for clinical recommendation, especially alongside CBT-I.
How to Use it
The technique is easy to teach in a single session. Walk clients through this sequence:
- Get comfortable with eyes closed.
- Choose a word, something random and emotionally neutral, unconnected to the day. Starting with a short word makes it easier to learn: CAT, SUN, or OAK work beautifully. As the technique becomes more familiar, clients can move to longer words if they like, RAIN, LAMP, or STONE, then RIVER, PILLOW, or CANDLE. There’s no right length. Some people always prefer short words; others find a longer word gives them more to work with. Let them choose what feels right and build from there.
- Picture the first image that comes to mind from the first letter of the word, just a flash, 2 to 3 seconds.
- Before it turns into a scene or story, move to the next letter and a completely different image. Fast. Unconnected.
- When the word runs out, pick a new word and keep going.
- If a worry drifts in, notice it briefly and return to the next letter. No struggle needed.
Practice it in session with eyes closed, then debrief. Common things to watch for: images becoming narrative (coach clients to cut them shorter, like a single frame rather than a video clip), or the technique generating activating content rather than settling it, worth monitoring in OCD presentations.
How it Fits in Different Presentations
OCD
Strong fit. Bedtime rumination in OCD often involves reviewing, checking, or seeking reassurance mentally. The shuffle redirects attention without requiring direct suppression, which would make intrusive thoughts worse. Frame it as redirection, not avoidance. Watch for the shuffle itself becoming a ritual. If it starts to feel like something that must be done perfectly, that’s an OCD signal worth addressing.
GAD
Excellent fit. Worry is highly narrative and future-focused, exactly the kind of organized thinking the shuffle disrupts. Pairs well with scheduled worry time and stimulus control within a CBT-I framework.
Depression
Good fit with caveats. Depressive rumination (past-focused, self-critical) disrupts sleep in a similar way to anxious worry. The shuffle offers a low-effort redirection at bedtime. Anhedonia can flatten imagery, so encourage simple, neutral images rather than vivid ones. Less effective in severe depression with psychomotor slowing.
ADHD
Well-suited. The racing, non-linear bedtime mind is a classic ADHD complaint. The shuffle’s rapid, channel-flipping quality often feels more natural to ADHD clients than slower relaxation scripts. Pairs well with structured bedtime routines.
Primary / Comorbid Insomnia
First-line consideration. The shuffle was designed for sleep-onset insomnia. Best used within a CBT-I framework rather than alone, especially for clients who find progressive muscle relaxation too effortful or activating.
Teens / Younger Clients
Very accessible. The playful, imaginative quality of the technique works well with adolescents. Try framing it as “your brain is a TV remote, keep changing the channel.” Useful for anxiety, ADHD, and performance-related sleep difficulties.
When to be Careful
- OCD with intrusive imagery: monitor whether the shuffle generates OCD-themed content. If it does, pause and reassess.
- Clients who already catastrophize about sleep: frame carefully. The goal is gentle, curious engagement, not a new task to perform correctly.
Clinical note
The shuffle works best when held lightly, offered as something to try, not a prescription to follow. Clients with anxiety are good at turning any technique into a test they can fail. Normalize that it won’t work every night, and that simply noticing it isn’t working is already a moment of mindful awareness.
How It Fits within Existing Frameworks
- CBT-I: Addresses the cognitive arousal component directly. Pair with stimulus control, sleep restriction, and cognitive restructuring.
- ACT: The shuffle is cognitive defusion at the moment of sleep; attention is gently redirected rather than suppressed or fused with.
- ERP (OCD): Not an exposure, but can interrupt compulsive bedtime reviewing and reduce avoidance of sleep itself. Framing matters: it should not function as a neutralizing ritual.
- Mindfulness: Like a body scan, it anchors attention to internally generated images rather than somatic sensations, which some clients find more accessible.
References
Beaudoin, L. P. (2013). The possibility of super-somnolent mentation: A new information-processing approach to sleep-onset acceleration and insomnia exemplified by serial diverse imagining. Cognitive Productivity Research Project, Simon Fraser University. Retrieved from http://summit.sfu.ca/item/12143
Beaudoin, L. P. (2014). The Cognitive Shuffle: A method for disrupting rumination and facilitating sleep onset. In Cognitive Behavioral Therapy for Insomnia (chapter). Springer.
Beaudoin, L. P. (2018). Serial Diverse Imagining: A new technique for insomnia. Sleep Medicine Reviews.
Harvey, A. G. (2002). A cognitive model of insomnia. Behaviour Research and Therapy, 40(8), 869 to 893.
Ong, J. C., et al. (2012). A randomized controlled trial of mindfulness meditation for chronic insomnia. Sleep, 37(9), 1553 to 1563.
Scullin, M. K., et al. (2018). The effects of bedtime writing on difficulty falling asleep. Journal of Experimental Psychology: General, 147(1), 139 to 146.