If you’ve been on social media lately – perhaps scrolling in the middle of the night, when you know you shouldn’t but you just can’t sleep – you might have seen those videos promoting a get-to-sleep technique called “cognitive shuffling”.

The idea, proponents say, is to engage your mind with random ideas and images via a special formula:

It’s popular on Instagram and TikTok, but does “cognitive shuffling” have any basis in science?

The cognitive shuffling technique was made famous by Canada-based researcher Luc P. Beaudoin more than a decade ago, when he published a paper about how what he called “serial diverse imagining” could help with sleep.

One of Beaudoin’s hypothetical examples involved a woman thinking of the word “blanket”, then thinking bicycle (and imagining a bicycle), buying (imagining buying shoes), banana (visualising a banana tree) and so on.

Soon, Beaudoin writes, she moves onto the letter L, thinking about her friend Larry, the word “like” (imagining her son hugging his dog). She soon transitions to the letter A, thinking of the word “Amsterdam”:

and she might very vaguely imagine the large hand of a sailor gesturing for another order of........

© The Conversation