Human Factors: What's The Difference Between 'Summative' And 'Formative' Usability Testing?

This article was originally published in The Silver Sheet

01 Jun 2009
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Executive Summary

USABILITY STUDIES RELATED TO HUMAN FACTORS engineering can be "summative" or "formative," and the two types typically call for different numbers of study participants. Summative testing is a form of device validation, while formative usability tests are lightweight studies usually conducted early in the design process. Experts weigh in

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Human Factors: What's The Difference Between 'Summative' And 'Formative' Usability Testing?

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