01
How long a test has to run before you can believe it
Sample size, duration, cycle effects, and what it really costs to call a winner a week too early.
Research6 min read
The Visiopt Knowledge Center
A working library
for people who
optimize for a living.
Guides, frameworks, and original research on conversion optimization, testing, tracking, and customer psychology - written to be referenced, not scrolled.
How long should a test run?Which attribution model do I trust?What should I test first?Why isn't my page converting?Explore by topic
01
Conversion optimization
Finding what blocks a decision on a page, and fixing it in the right order.
02
Testing & experimentation
Designing tests that answer a question, and reading results without wishful thinking.
03
Customer psychology
Why people hesitate, what earns trust, and how belief forms before a purchase.
04
Tracking & attribution
Measuring what actually happened when the platforms disagree with each other.
Browse by content type
Latest Publications
02
Reading attribution without fooling yourself
Where common attribution models disagree, why they disagree, and which one to trust for which decision.
Guide2 min read
03
A hierarchy for deciding what to test first
Ranking ideas by reach, effort, and how much they actually change the decision a visitor is making.
Framework1 min read
04
A 32% lift from elements that lost on their own
What happened when a page that had already failed three A/B tests was tested as combinations instead.
Case Study1 min read
05
Choosing the one metric a test is allowed to move
A primary measure, defined before launch, is what stops a test from being reinterpreted after the fact.
Framework1 min read
No posts found for this content type.
About this library
Built to be referenced for
years, not read once.
Everything published here is written to stay useful — maintained, dated, and revised when the ground shifts. No news, no roundups, no reposted commentary. Original work on optimization from a team that does it at scale, organized so a question leads to an answer rather than an archive.
Get new work as it publishes
Research, frameworks, and case studies, sent when they're published.
No digest, no newsletter filler. Unsubscribe anytime.
Put the knowledge to work
Turn what you learn into
better results with Visiopt.
See what is driving conversions, test what matters, and understand which changes are actually improving revenue.