doesn’t necessarily change SUS scores<\/a>, although a single hard task did have an effect on less experienced users.<\/p>\nSo using survey data to gauge perceptions of usability outside a usability test probably provides a reasonable measure of task effectiveness at a high level. Comparing these scores with those taken within a usability test is for now risky. Compare surveys to surveys and usability tests to usability tests.<\/p>\n
And finally, keep in mind that most usability questionnaires. like the SUS, were envisioned to be administered along with a usability test. While they provide a nice score to track on dashboards, they don’t tell you what to fix in the software or website–which is usually the point of measuring usability in the first place.<\/p>\n<\/form>\n","protected":false},"excerpt":{"rendered":"
Usability is attitude plus action. Attitudes and actions are measured during a usability test where a representative sample of users are asked to complete tasks. During the test we collect task-based metrics of performance (completion rates, task-time and errors) and perception (task-level difficulty). 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