Usability Testing

Use when

• You need to know whether users can complete important tasks.
• You need direct evidence about confusion, errors, or mismatched expectations.
• You are testing designs, prototypes, or live-product flows.

Best for

• Onboarding and registration
• Critical journeys
• Trust and error handling

How to design it

• Use realistic tasks and scenarios.
• Encourage participants to think aloud without coaching them through the task.
• Record completion, confusion, errors, and confidence, not just opinions at the end.

Suggested sample size

Start with 5 to 8 participants in a priority segment, then add more if the audience is highly varied.