The Housefly Effect and Other Nudges That Change Behavior | Brainfluence

In this Brainfluence episode, host Roger Dooley sits down with behavioral scientist Eva van der Broek and advertising creative Tim den Heijer, co-authors of the intriguing new book, The Housefly Effect: The Nudge Psychology That Steers Our Everyday Behavior. Together, they dive into the quirky yet profound ways that tiny changes—think a simple housefly sticker in a urinal—can dramatically shift our decisions and habits. Join us as Eva and Tim unpack the stories and science behind these small interventions, from the power of naming an “effect,” to surprising marketing strategies, the influence of groupthink, and real-world examples like the “Cobra Effect.” Along the way, you'll learn why imperfections can make products more appealing, how unintended consequences play out in public policy, and why sometimes being nudged in the right direction matters more than knowing exactly why you changed your behavior. Whether you’re a marketer, policy maker, or just curious about how our minds work, this episode is packed with playful insights and practical advice on harnessing the subtle art of nudging. Show Notes page with audio, text, resources: https://www.rogerdooley.com/the-house... Amazon - The Housefly Effect: https://amzn.to/3Ky34E4 LinkedIn - Eva van der Broek:   / evdbroek   LinkedIn - Tim den Heijer:   / timdenheijer   Playlist - Brainfluence:    • The Ministry of Common Sense with Martin L...   Playlist - Behavioral Science:    • Behavioral Science   Connect with Roger:   / dooley     / rogerdooley   https://www.threads.net/@rogerdooley   / roger.dooley     / rogerdooley   Roger’s Stuff: Website: https://www.rogerdooley.com Neuromarketing: https://www.neurosciencemarketing.com... Forbes: https://www.forbes.com/sites/rogerdoo... [00:00] Intro [00:43] What is the Housefly Effect? [02:39] Fly in the urinal [03:53] Effect Effect explained [06:02] Naming boosts persuasion [06:43] Dunning Kruger in marketing [07:54] Overconfidence and blind spots [09:58] Trump’s simple messaging [12:10] Influence beyond “right” reasons [13:14] Political campaign examples [14:19] But You Are Free Effect [15:33] Power of imperfections [16:21] Pratfall Effect in marketing [18:24] Smashing your brand [19:38] What is the Cobra Effect? [21:06] Real-life cobra examples [23:27] Avoiding groupthink failures [24:18] Smart intervention strategies [26:26] When to use behavioral science [27:36] Wrapping up & where to connect About Eva van der Broek: Eva van den Broek holds a PhD in behavioral economist and is the founder of Behavioral Insights in The Netherlands. She is an expert in behavioral science who works closely with policymakers and leaders in large organizations to drive positive change. Throughout her career, Eva has recognized the complexity of decision-making, emphasizing that people don’t always make choices for the “right” reasons—even when those are the choices organizations want them to make. Rather than focusing solely on convincing people to act for ideal motives, she advocates for reshaping environments and options to encourage better outcomes. Eva is pragmatic about human nature, highlighting that it’s often more practical to design systems that nudge good decisions than to expect everyone to act from perfect reasoning. Her insights challenge organizations to think broadly about how real, lasting change happens. About Tim den Heijer: Tim den Heijer is a creative strategist, copywriter and founder of B.R.A.I.N. Creatives. He is a behavioral science enthusiast and advertising expert who found inspiration close to home, just a short drive from Schiphol Airport in the Netherlands. Alongside Eva van der Broek, Tim seized the opportunity to write a book that delves into the quirky realities of human behavior they often discuss in their lectures. Fascinated by moments where tiny changes lead to outsized results, like the dramatic impact of a simple painted fly in a urinal at Schipho, they sought a metaphor akin to the butterfly effect to anchor their stories. For Tim, solving everyday issues with creative behavioral insights is at the core of his journey as a thinker and storyteller. Tim has 20 years of experience in advertising and has worked for some of the biggest brands on the planet.