A great course, masterfully delivered and rich with practical insights.
Rohit
Online Influence Power Course participant, 2025
the only newsletter I always open
The Online Influence Newsletter
Stop guessing what makes people act.
Every three weeks, get one proven behavioral insight, one real case and one practical action you can use immediately.
- See why people hesitate online
- Find the friction blocking action
- Test one practical change immediately
No daily noise. One useful edition every three weeks.
Built on proven behavioral science
37
proven psychological principles
1,000+
professionals applying our methodology
101,238
books sold worldwide
What you will receive
One principle. One case. One action.
Each edition turns behavioral science into something you can use within minutes.
The Online Influence Newsletter · Sample edition
Why almost-done carts stall — and the tiny nudge that finishes them.
- 1
The behavior problem
People fill a cart, then quietly abandon at the last step.
- 2
The principle behind it
Loss aversion and choice overload weigh heavier than the promised gain.
- 3
A real-world example
A retailer removed one field and reframed the CTA — completed checkouts rose noticeably.
- 4
One practical action
Cut one field, then rewrite the CTA around the outcome, not the action.
- 5
Sources for further reading
Two short references you can open in a new tab.
Trusted by professionals and organisations worldwide
Booking.com
Mercedes-Benz
Disney
Coca-Cola
Allianz
Start with one useful idea
Tiny AI prompts change real behavior.
Small wording changes can shape bigger decisions. This short breakdown shows five changes you can test yourself.
5-minute breakdown
Five tiny prompt changes that shift behavior.
- Reduce choice before asking for action
- Make the next step obvious
- Use timing to strengthen prompts
- Remove friction before adding motivation
Meet the expert
Meet the mind behind the method.
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-author of Online Influence
- International trainer and speaker
- Behavioral science made practical
WHAT PARTICIPANTS SAY
Science made practical.
Feedback from professionals who completed the Online Influence Power Course with Bas Wouters (5 live sessions of 2 hours, 2025).
- participant responses
- 37
- average rating
- 4.7/5
- recommendation score
- 9.4/10
- NPS
- +78
The perfect mix between science and application for the online environment. A total must!
Pilar Bringas
Online Influence Power Course participant, 2025
Fantastic. Giving real-world tools to drive results. Explained clearly and simply.
Clive
Online Influence Power Course participant, 2025
Proven in practice
See the psychology create results.
Real behavioral changes. Measurable business results.
+43.4%
SimCity
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.
Read the case+400%
bol.
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.
Read the case+2000%
SEAT
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.
Read the caseWant the thinking behind these results?
Every three weeks, we break down one behavioral principle, real case or practical experiment.
Latest from Online Influence
New ideas. Practical applications. Better decisions.
Watch, read and apply the latest Online Influence insights.
Recording · 22 min
Recordingbehavioral science
Why defaults decide almost everything
Redesign one default this week to lift completion without pushing harder.
22 minWatch the recording →
Jul 1, 2026
Article · 6 minAnatomy of a checkout that stops leaking
Articlemarketing and conversion
Anatomy of a checkout that stops leaking
Cut one field and reframe one CTA — measure the lift within a week.
6 min readRead the article →
Jun 24, 2026
Guide · 12 minThe behavioral funnel guide
Guideoffers and funnels
The behavioral funnel guide
Map your funnel to five decision moments and remove friction on the two heaviest ones.
12 min readOpen the guide →
Jun 10, 2026
Trusted by professionals
Trusted by people applying this work.
“A rare combination of scientific rigour and immediate practical value. I use these ideas the same week I read about them.”
Head of Digital
European retail brand
“Clear, honest and grounded in evidence. It has become one of the very few newsletters I actually read from top to bottom.”
Product Lead
International SaaS company
“It changes how we look at our own funnels. Small principles, better decisions, measurable results.”
Marketing Director
Financial services
“A must-read for anyone involved in online influence.”
Dr. Robert Cialdini · Author of Influence and Pre-Suasion
Bas Wouters & Joris Groen
ONLINE
INFLUENCE
A practical guide to digital persuasion
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