Services
- - Conversion optimization (CRO)Guidance for your experimentation program, from idea to analysis. More experiments, better conversions and informed decisions.
  - Improve your experimentation programMake experimentation a structural part of your organization. We help teams grow with advice, support and training.
  - Product experimentationDevelop products that really work. Validate assumptions and make informed choices.
- - Qualitative researchUnderstand thresholds, motivations and behaviors of your users and discover the biggest optimization opportunities.
  - AutomationsSpeed up your optimization process with automations. Less manual work, more time for insight and strategy.
  - Process MiningDiscover hidden paths, bottlenecks and opportunities to improve the online experience, backed by data.
- See all services
Training
- - Training Conversion SpecialistWant to learn all about conversion optimization? In this training you will learn to test, analyze and optimize like a pro. From knowledge of A/B testing to psychology and UX.
  - Consumer Psychology TrainingTo improve the conversion rate of your website, online store or product, it is essential to understand your customers' drivers. During the Consumer Psychology course, you will learn five optimization strategies to take your CRO program to the next level.
  - Data analysis training for CROPractical training in which you will learn to analyze, validate and present data convincingly within CRO.
- - Incompany TrainingCustomized training for teams looking to grow in experimentation, validation and conversion optimization.
- View all courses
Customers and Results
- - How Bidfood used process mining to discover blind spots in customer behaviorWant to know how customers really move through your platform? Bidfood discovered it through process mining and targeted improvements to their blind spots.
  - A successful experimental program according to DPG MediaHow DPG Media is building a mature culture of experimentation with a strong team, smart tools and training.
  - How AW Lab took the first step toward a validation-driven culture
- - CRO at Beter BedWhat can you learn from 10 years of CRO at Beter Bed? Insights, pitfalls and how they firmly anchored their testing culture.
  - How NS builds a successful CRO strategy with Online DialogueRead how a large organization like NS laid the foundation for a successful validation culture. And grew from 27 to 145 tests in one year.
  - Learning-by-doing: 4 years of working together on VodafoneZiggo's CRO programHow VodafoneZiggo grew in 4 years from gut testing to a robust CRO program with 20 teams and a Center of Excellence.
- See all customer cases
Blogs
CRO toolkit
About us
- - TeamDriven specialists who learn by experimenting
  - EventsSharing knowledge and inspiring each other. We bring peers together to learn and grow.
  - Partners Online DialogueTools from our partners that help translate behavior and data into impact.
- - Get in touchInterested in our approach or a collaboration? We'd love to engage with you.
  - Sign up for the newsletterStay tuned for the latest news on CRO and experimentation!
  - VacanciesCome work at the agency for data-driven optimization.

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Isabella Klaassens

Behavioral expert

Isabella has always loved people: how they think, how they behave, who they are. This interest led her to train as a basic researcher in social, health and organizational psychology. However, she did not like the slow pace of academia, so she switched to the more dynamic applied field. She currently works as a Behaviorist and Head of Academy at Online Dialogue, where she plays an important role in teaching workshops and courses, conducting and analyzing (A/B) tests and advising companies in optimizing their user experience and conversion rates. Ultimately, it's all about her passion in understanding the complicated ways people function.

0302272440

All blogs by Isabella Klaassens

March 26, 2025

BOOM! The 5 psychological optimization strategies

Digital optimization is about more than just data analysis and A/B testing. For example, it's not just about what works, but why something works. Why do visitors click one button and ignore another?

Isabella Klaassens

Aug. 6, 2024

Buy Now Pay Later Part 1: The Benefits and Temptations

Isabella Klaassens

June 29, 2024

Is choice overload a myth?

Isabella Klaassens

November 17, 2023

The science and psychology of disappointment - Michael Aagaard

Isabella Klaassens

October 3, 2023

The illusion of a magic list: Why I don't share psychological tactics for A/B testing

Isabella Klaassens

March 31, 2023

Diversity and inclusiveness in the workplace: Psy Meetup 4

Isabella Klaassens

November 2, 2022

Psychology behind resistance: application in practice

Isabella Klaassens

April 12, 2022

Psychology meetup: How do you gain the best insight into drives and behavior?

Isabella Klaassens

Aug. 24, 2021

The online Battle of Attention

Isabella Klaassens

May 10, 2021

Why A/B testing when ‘the group’ has already determined the outcome anyway?

Isabella Klaassens

February 23, 2021

Why you're never done with A/B testing

Isabella Klaassens

January 19, 2021

Take a course in 2021

Isabella Klaassens

1 2 ... 8

Isabella Klaassens

All blogs by Isabella Klaassens

BOOM! The 5 psychological optimization strategies

Buy Now Pay Later Part 1: The Benefits and Temptations

Is choice overload a myth?

The science and psychology of disappointment - Michael Aagaard

The illusion of a magic list: Why I don't share psychological tactics for A/B testing

Diversity and inclusiveness in the workplace: Psy Meetup 4

Psychology behind resistance: application in practice

Psychology meetup: How do you gain the best insight into drives and behavior?

The online Battle of Attention

Why A/B testing when ‘the group’ has already determined the outcome anyway?

Why you're never done with A/B testing

Take a course in 2021

Get rid of those assumptions. Time for proof.