The SUPR-Q (Standardized User Experience Percentile Rank Questionnaire) test is a set of 8 standardized questions that measure users’ perceptions around several components of a website including usability, trust and credibility, appearance, and loyalty.

The SUPR-Q is a reliable measure of a website’s perceived quality. It has a high correlation with similar instruments such as SUS (System Usability Scale) and NPS (Net Promoter Score), which have been used for over 25 years. The SUPR-Q has been adopted by over 200 websites and 4500 users from 13 countries. SUPR-Q users include Amazon, Walmart, Yelp, and Paypal.

The real benefit to the SUPR-Q test comes when it’s run regularly, in order to track the same metrics on an ongoing basis. By establishing a baseline metric, companies can measure a redesign’s impact on usability, appearance, credibility, and loyalty.

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