Effort: Low
What to notice
Summarize the selected option, reasons, cost and limitations just before commitment.
Where it fits
- Fits
- Booking or application users whose choices affect the final outcome.
- Use it when
- When essential information can fit a readable summary.
- Avoid it when
- When a “review” would introduce new consent or contracts.
How to build it
- Create one summary of the user’s selections.
- Retain costs and unresolved conditions.
- Link each item to editing and identify the commitment action.
Measure
- Main metric
- Share of eligible users committing to their intended configuration
- Guardrail
- Corrections after commitment and mistaken configuration
- How to measure
- Allocate comparison groups before exposure and use equal follow-up and eligibility. Track Share of eligible users committing to their intended configuration alongside Corrections after commitment and mistaken configuration.
When it backfires
Do not silently add selected options in the summary.
Alternatives
Theory behind it
Recognition over recall
Make necessary options visible rather than requiring users to remember them.
Practitioner framework
Confidence calibration
Treat reported confidence and actual correctness as different information.
Limited evidence
Evidence limits: An editorial web application; conversion effects on this interface are unmeasured. This usability guideline does not recommend an unlimited list of choices. Check information overload as well as memory demands.