SEQ vs. SUS

Summary: Pair qualitative methods with quantitative metrics like the System Usability Scale (SUS) for benchmarking and the Single Ease Question (SEQ) for task-level insights. Use both carefully with qualitative data.

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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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Maddie Brown is a UX researcher with expertise in democratizing research, qualitative methods, and workshop facilitation. Formerly with Nielsen Norman Group, she has worked as a UX consultant across industries and as an in-house researcher specializing in remote research tools. Maddie empowers teams to adopt user insights and drive impactful solutions through collaboration and human-centered strategies.

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