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Analytical performance and a lay user’s completion of the entire self-testing task chain answer different questions. Collection, execution and interpretation may be distinct steps. Success in one does not automatically establish the others.
Define the assessment
Define support available to intended users and the actions they should perform independently. A result obtained with staff-prepared specimens may not represent real collection ability. Link task observation, result records and user explanations appropriately.
Worked example
For example, participants interpret result lines correctly, but some fail to complete the specimen step. The team does not describe interpretation success as overall test success. It separately presents inadequate collection, execution errors and interpretation status. Attempts completed after help remain distinct from independent initial attempts, and improvement questions target the specific task.
Practical checks
- Define task start and completion criteria in the intended-user context.
- Record the type and timing of research-staff assistance for every attempt.
- Link initial attempts, repeats and interpretation within the participant pathway.
Decision and limitations
The report should show which stages were evaluated in which users. Do not generalise controlled-environment success to every home condition. Qualified reviewers assess implications of misunderstood results or incomplete tasks; this research discussion does not instruct individuals to diagnose themselves or change treatment.
Frequently asked questions
- Does correct interpretation establish total test success?
- No. Collection and execution need their own assessment.
- Is assisted success independent use?
- No. Preserve the nature of assistance and explain the outcomes separately.