30 experiments exploring how defaults, framing, and friction shape every decision you make.
Opt-in vs opt-out. Predict donation rates, then see the shocking real data.
Pre-checked vs unchecked. How much does a single tick change conversion?
Design a privacy page and see how defaults change real user behavior.
Design the auto-renew flow and see retention impact.
Accept All vs granular consent. Compare click-through rates.
401k auto-enroll vs opt-in. See the 30-year wealth difference.
Default on vs off. Track how acceptance rates change.
30 vs 60 min default. See how it shifts actual meeting times.
Set different default tip amounts. See tipping behavior change.
Daily vs weekly default. Watch unsubscribe rates change.
"$1/day" vs "$30/month" vs "$365/year". Rate willingness to pay. They are identical.
Three pricing tiers. Add or remove the decoy. Watch choice shift.
Same medical scenario, two frames. Track how your preference flips.
Different "original prices" crossed out. Rate perceived value.
Add "X people bought this." See conversion prediction change.
"Only 3 left!" How much does urgency boost purchase intent?
Percentages vs fractions vs frequencies. Track comprehension differences.
Frame changes as before vs after. Measure motivation difference.
Positive-first vs negative-first reviews. How does order change purchase intent?
Per unit vs total price. How does it shift value perception?
Build a checkout flow, add/remove steps. See the funnel drop-off in real time.
Vary complexity rules. Track completion rate changes.
Add fields one by one. Watch completion rate drop per field.
When do "Are you sure?" dialogs help vs annoy users?
Simulate 1s/3s/5s/10s delays. When do users bail?
1 vs 3 vs 5 clicks to content. Track success and satisfaction.
"Error 404" vs helpful messages. Rate the UX difference.
1 vs 5 vs 10 step onboarding. See completion rates plummet.
Compare satisfaction between undo and confirmation approaches.
Identify manipulative vs ethical design patterns. Take the quiz.