This single text made girls 45% more likely to get vaccinated
Nudge7 Jul 2025

This single text made girls 45% more likely to get vaccinated

Can one text message save 100s of girls from cervical cancer? Today on Nudge, Niall Daly and Dr Giulia Tagliaferri discuss their county-wide study involving 55,000 girls. Their experiment had some eye-opening results, so I decided to copy it. I ran my own study on my listeners to see if I could increase my sales. Did it work? Listen to find out. My study emails: https://ibb.co/HTdMDHxT My study results: https://ibb.co/PGRp2d1y Niall and Guilia’s paper: https://shorturl.at/3nlyH Behavioural Insights Team: https://www.bi.team/ Subscribe to the (free) Nudge Newsletter: https://nudge.ck.page/profile Connect on LinkedIn: https://www.linkedin.com/in/phill-agnew-22213187/ Watch Nudge on YouTube: https://www.youtube.com/@nudgepodcast/ The Science of Marketing Course (use code RESERVED4ME to get 50% off): https://science-of-marketing.teachable.com/ --- Sources: Daly, N., Merriam, S., & Tagliaferri, G. (2023). Effectiveness of SMS reminders to increase demand for HPV immunisation: A randomised controlled trial in Georgia (Working Paper No. 004). Insights Publico. Milkman, K. L., Patel, M. S., Gandhi, L., Graci, H. N., Gromet, D. M., Ho, H., Kay, J. S., Lee, T. W., Akinola, M., Beshears, J., Bogard, J. E., Buttenheim, A. M., Chabris, C. F., Chapman, G. B., Duckworth, A. L., Goldstein, N. J., Goren, A., Halpern, S. D., John, L. K., ... & Van den Bulte, C. (2021). A megastudy of text-based nudges encouraging patients to get vaccinated at an upcoming doctor’s appointment. Proceedings of the National Academy of Sciences, 118(20), e2101165118. Patall, E. A., Cooper, H., & Wynn, S. R. (2010). The effectiveness and relative importance of choice in the classroom. Journal of Educational Psychology, 102(4), 896–915. Streicher, M. C., & Estes, Z. (2016). Multisensory interaction in product choice: Grasping a product affects choice of other seen products. Journal of Consumer Psychology. Advance online publication.

Episoder(281)

“These two words increased sales by 18%.” Robert Cialdini

“These two words increased sales by 18%.” Robert Cialdini

16 years ago a chain of Chinese restaurants wanted to increase sales without changing the price.  They didn’t change the product.  The service.  The chef.  The food.  Instead, they changed two wo...

23 Feb 24min

When you can’t stop seeing the thing you’ve just discovered

When you can’t stop seeing the thing you’ve just discovered

I watched Home Alone and suddenly started hearing the theme tune everywhere.  I thought I was going insane.  But Tom Bowden-Green and Luan Wise explained that I actually fell for a fairly well-known...

16 Feb 26min

The Psych-Trick Behind One of the Decade’s Fastest Growing Orgs

The Psych-Trick Behind One of the Decade’s Fastest Growing Orgs

HelloFresh is one of the fastest-growing companies of the past 20 years.  And it’s down to one, relatively simple behavioural science tactic.  --- Subscribe to the Nudge Vaults: https://www.nudgepo...

9 Feb 26min

Real-world examples of cognitive biases

Real-world examples of cognitive biases

Most of us are completely oblivious to the cognitive biases that dictate how we live our lives.  Today, with Tom Bowden-Green and Luan Wise, we cover seven cognitive biases that all of us fall for.  ...

2 Feb 24min

“This common pricing strategy is completely wrong!” Robert Cialdini

“This common pricing strategy is completely wrong!” Robert Cialdini

“Say you’ve calculated your price and it comes out at £120,121.  Most would round it down to £120,000.  That’s completely wrong.”  That’s what Robert Cialdini told me on the latest episode of Nudge...

26 Jan 27min

Robert Cialdini: “This study on 6,700 websites proved my principle!”

Robert Cialdini: “This study on 6,700 websites proved my principle!”

This study analysed 6,700 websites in an unprecedented A/B test.  The results proved something that Dr Robert Cialdini had been preaching for years.  Today, on Nudge, Robert Cialdini joins me again,...

19 Jan 26min

The Secret Behind KFC’s Success

The Secret Behind KFC’s Success

KFC keeps its recipe secret.  It’s stored in a vault in an unknown location.  Only two KFC executives know the ingredients.  Neither are allowed to fly on the same plane.  But this secrecy is illo...

12 Jan 23min

Why is it so hard to say no?

Why is it so hard to say no?

In 1963, the Milgram experiments revealed something unsettling.  Most people kept administering what they believed were painful electric shocks, not because they wanted to, but because they couldn’t ...

5 Jan 30min

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