How SimCity increased sales by 43.4%
A behavioural intervention in the checkout flow used social proof and clearer defaults, changing how players evaluated the offer.
Higher sales without changing the product or price.
4.8/5 - "Outstanding AI prompts and training!" - verified by 1000+ followers
Online Influence Free AI Lab
Use AI with more behavioral intelligence.
Learn how AI and behavioral science work together to create clearer communication, stronger experiences and better decisions.
- Apply AI to real communication challenges
- Use behavioral principles inside your prompts
- Learn through practical experiments and examples
Free access. Practical learning. No AI hype.
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Built on proven behavioral science
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proven psychological principles
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professionals applying our methodology
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books sold worldwide
Trusted by leading teams
Meet the expert
Meet Bas Wouters
Bas Wouters makes behavioral science practical. As co-author of Online Influence, he helps professionals apply proven principles to digital communication, conversion and AI.
- Co-founder, Cialdini Institute
- International bestselling author
- Trained thousands of professionals worldwide
What experts say
Trusted by authors, professors and global brands.
Endorsements from experts and practitioners across four continents.
“Just when I thought I had seen everything in persuasion, I discovered an entirely new universe.”
Giovanni Begossi
Bestselling Author & El Professor da Oratória — Brazil
“The perfect mix between science and application for the online environment. A total must!”
Pilar Bringas
Associate Professor, University of Madrid and IESE Business School — Spain
“Bas has a rare ability to turn behavioral psychology into practical actions you can use immediately and that actually improve results.”
Wesley de Ruiter
Disney
“Bas is the #1 expert in the world at making marketing psychology practical and easy to apply.”
Ezio Sabatino
Sabatino Marketing — USA
“We applied the principles and saw an immediate increase in conversions.”
Xander Wiewel
Marketing Institute, Eli Lilly Global
“Bas is the absolute #1 when it comes to applying marketing psychology. Together, we have worked with multiple multinationals and universities across India.”
Venkataram Arabolu
Former CEO, BSI India
Proven in practice
See the psychology create results.
Real behavioral changes. Measurable business results.
How Bol.com increased reviews with 400%
By reframing the request moment and lowering the perceived effort, more customers left a review — with almost no extra cost.
A 4× increase in review volume in weeks.
How SEAT generated 2000% more leads
A small change in how a call-to-action was positioned in the customer's journey unlocked a large behavioural shift.
A dramatic lift in qualified lead volume.
Not only world leading companies trust us, we also partner with leading universities
The book
The book behind the method
Online Influence translates decades of behavioral science into practical digital applications: how to design pages, flows and AI conversations that respect people and still work.
- Over 100,000 copies sold worldwide
- Recommended by practitioners in Fortune 500 companies
- The foundation of the Online Influence method
Online Influence Free AI Lab
Unlock free access to the OII AI Lab.
Start today with practical lessons, behavioral prompts and real cases — and learn how to use AI with more behavioral intelligence.
- Practical lessons and experiments
- Behavioral prompts, cases and tools
- Free access. No AI hype.