What Noom can teach product teams about behavior change and retention | Christine May (Behavioral Scientist & Advisor, Ex-Noom)

Christine May helped spearhead behavioral science at Noom, shaping it into an engine for user segmentation and accountability. As their former Head of Behavioral Science, she championed Noom’s “big picture” motivation model—tying everyday habits to goals—and played a role in scaling one-on-one coaching into a digital system for millions. Now, Christine helps consumer tech startups build habit-forming experiences rooted in evidence-based psychology.In our conversation, we explore:The book club principle: How to embed accountability in features customers actually wantWhy 90% of users reject direct accountability features (and how to solve this)How Noom's lengthy sign-up flow acts as a commitment filterThe counterintuitive confidence level that predicts user successWhat makes fixed-length plans more effective than endless subscriptionsHow to design rewards around behaviors instead of outcomesThe unexpected way social desirability drives product engagementThis episode is packed with practical insights on designing for sustainable behavior change, creating effective accountability systems that users actually want, and the surprising psychology behind what motivates people to stick with challenging goals.Enjoy this episode? Rate it and leave a review. It really helps others find the podcast.Learn more about Kristen and Irrational Labs ⁠here⁠.