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December 2, 2025 20 mins

Chris and Xand continue their conversation about belief with Ryan McKay, Professor of Psychology at Royal Holloway, University of London.

They want to know why some beliefs take hold so strongly, what’s happening in our brains when we hold on to them, and how trust, identity, and community shape what we believe. Beyond that, they’ll explore why health beliefs can be so difficult to shift, and whether it’s ever really possible to change someone’s mind. From the psychology of delusions to the spread of everyday health narratives, this episode dives deeper into the mechanics of belief.

If you’d like to share your thoughts on this or any other topic covered on the podcast, you email us at whatsupdocs@bbc.co.uk or Whatsapp on 08000 665 123.

Presenters: Drs Chris and Xand van Tulleken Guest: Professor Ryan McKay Producer: Maia Miller-Lewis Executive Producer: Rami Tzabar Editor: Jo Rowntree Researcher: Grace Revill Tech Lead: Reuben Huxtable Social Media: Leon Gower Digital Lead: Richard Berry Composer: Phoebe McFarlane Sound Design: Melvin Rickarby

At the BBC: Assistant Commissioner: Greg Smith Commissioning Editor: Rhian Roberts

A Loftus Media production for BBC Radio 4

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