If you need your message to be remembered and believed, then you might want to use a rhyme. The Keats Heuristic, as depicted by
@sketchplanator, is the finding that rhyme makes the same message more believable.
The original research comes from a 1999 study by Matthew McGlone and Jessica Tofighbakhsh from Lafayette College. They found that making the same statement rhyme boosted believability.
But rhyme does more than that. In 2021, Alex Thompson and I, inspired by the original study, tested another aspect of rhyme: its effect on memorability.
We showed participants a list of 10 statements.
Half of the statements rhymed (e.g. "woes unite foes"), and half of them didn't (e.g. "woes unite enemies").
People had 5 minutes to read through the list. Then we asked them to return at the end of the day and recall as many phrases as possible.
People remembered 14% of the non-rhyming statements, but 29% of the rhyming ones - a doubling of memorability.
While this study was run with a small group of non-representative participants, in 2024, I reran it using a much larger representative sample and found similar results.
There are plenty of brilliant applications of rhyme in older campaigns. For example, Pringles' "Once you pop, you can't stop". Or the Ministry of Health's "Coughs and sneezes spread diseases".
So whatever message you're writing, consider adding a bit of rhyme...
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I'm running a training session on applying behavioural science for better B2B marketing on Tuesday 13th October.
More details here:
tickettailor.com/events/astr…