Post-Task vs. Post-Test Questionnaires in Quantitative Usability Testing

Summary: Learn when and why to use post-task and post-test questionnaires in quantitative usability testing – and how combining both can help you pinpoint issues and improve UX.

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Post-Task vs. Post-Test Questionnaires in Quantitative Usability Testing

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Beyond the NPS: Measuring Perceived Usability with the SUS, NASA-TLX, and the Single Ease Question After Tasks and Usability Tests

Post-test questionnaires like the SUS measure perceived usability of an entire system; post-task scales suggest problematic parts of a design.

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Rachel Banawa is an Experience Specialist at Nielsen Norman Group. Rachel leverages her extensive training in quantitative methods and statistics in her research to turn complex data into actionable, evidence-based insights. She holds a Ph.D. in health policy and management from the University of California, Los Angeles.

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