Experiment recipes

Copy-paste starting points for common research designs. Adjust page counts and group names to match your study.

Fixed questionnaire (no experiments)

Goal: Everyone sees the same flow.

No randomisation on sections and pages
Optional display logic for screener skip or answer-based follow-ups

Counterbalanced question order

Goal: Reduce order bias without hiding content.

Randomise order at page level (blocks) or section level (pages)
Keep instructions on a separate page with no randomisation

Shorter survey — random module sampling

Goal: Each person sees some modules, not all; group names not needed in results.

Split modules into a section
Present a subset → e.g. 2 of 5 subsections
Do not enable Randomisation groups

Classic A/B test (one variant per participant)

Goal: Group A vs Group B with named conditions in results.

Create a section with one page (or subsection) per variant
Present a subset → 1 of N
Enable Randomisation groups → map Group A/B to each target
Add shared post-task questions outside the randomised section
Keep thank you page outside the section

Multivariate test (3+ conditions)

Goal: Three or more between-subjects arms with balanced assignment.

Same as A/B with N pages and N groups (or N blocks on one page)
Use weighted randomisation if groups are not equal size
Test every arm in preview with Follow logic

Prototype comparison (usability test)

Goal: Same task (or parallel tasks), different prototypes per group — including multi-page flows with per-page starts and shared or per-task ends.

Add prototypes and assign a source prototype on task pages in Build
Configure interactive tasks (start, end, paths) on those pages
Compare assets at section level when multiple pages share one source asset, or page level for a single task screen
Map variant task mapping (start / end / success) on each non-original prototype — use Per page or Per task when source pages or goal tasks differ
Optionally combine with section randomisation if each group also has a different task flow
Define groups in the creation wizard or inline in compare assets

Example: Page 4 (goal-based, start + end) and Page 5 (first click, start only), two age cohorts, two prototype files — see Multi-page flow use case in Compare assets.

Prolific / custom link routing

Goal: Condition comes from the URL, not random assignment.

Create a URL parameter variable (e.g. ?condition=B)
Display logic on each page or section: show when variable equals the right value
Do not use section subset mode — assignment comes from the link

Mixed: random group + conditional follow-up

Goal: Between-subjects main task, then answer-driven paths.

Randomisation groups for the main between-subjects block
Shared later pages with display logic based on answers
Branching to jump qualified participants to the main block