We provide research, meta-analysis, and thoughts on HCI to optimise visitor’s experience of any application.

linkLearn About Usability Questionnaires

  • linkUMUX-Lite: A detailed insight on the UMUX’s kid

    TL;DR: The UMUX-Lite is a short 2-items questionnaire that incorporates the TAM. It has good psychometric properties and can be correlated with the System Usability Scale. The UMUX-Lite is really a direct descendant of UMUX, it assumes that user acceptance of a new technology is based on its perceived usefulness (Item 2 of the UMUX)…

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  • linkUnderstanding the UMUX: A guide to the short but accurate questionnaire

    TL;DR: The UMUX is a short, 4 items questionnaire that correlates to the System Usability Scale. It is a valid and reliable way of measuring perceived usability. Its short form makes it a good asset in a researcher’s toolbox of UX Metrics that can be administered in-the-wild or on user testings. There are a lot…

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  • linkThe positive SUS: as good as the original

    TL;DR: The positive SUS, designed by Sauro and Lewis in 2011, is as good at measuring perceived usability as the original System Usability Scale designed by Brooke in 1996. The positive SUS could help in studies in which cognitive load is a concern, while the original SUS ability to detect acquiescence bias could be used…

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All usability questionnaires →

linkUX Guidelines

  • linkSize guidelines for text legibility

    TL;DR: For creating a legible text use font size of 18 pixels or larger, with line spacing of at least 120% —with larger line spacings being more likeable. Adding at least some margin around the text, makes it more preferable. Deciding which font size to use can be an endeavour. Whether deciding for a blog…

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  • linkPromo codes on checkout pages: Pros and cons

    TL;DR: Promo codes help visitors save money and increase sales for people already interested. Adding a promotional code to a design increases the likelihood of process abandonment, as people may wander off to another website in search of the code. Visitors that have a code could be more satisfied with their purchase, while those who…

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  • linkWhen to use loading indicators (and which)

    TL;DR: Use a looped animation for waiting times between 2000ms and 10000ms. A progressbar is best to be used for waiting times from 10000ms to 30000ms. When the expected waiting time is more than 30000ms (half a minute) show a progress bar and a time-to-complete estimation, to inform the visitor when to come back. linkLooped…

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All UX Guidelines →

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