Usability Tools Podcast with Jared Spool & Brian Christiansen

Jared Spool discusses tips and tools for improving your site's user experience with Christine Perfetti and Brian Christiansen. They share someone UIE's most important findings from our decades of research on web design and usability.

Episode #9 Statistical Significance

October 22, 2007  ·  27 minutes

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Statistical significance revolves around having enough participants to make your findings valid. However, the number of participants necessary can vary widely, depending on what you’re studying and how. Join us for a podcast that will help you understand how to make this determination for your projects.

Show Notes

This week, Christine was tied up getting ready for our upcoming UI12 conference, so Brian Christiansen joins me for a show whose topic came from our reader, Colin. He wrote in to ask about the statistical significance of usability or field tests.

Statistical significance revolves around having enough participants to make your findings valid. However, the number of participants necessary can vary widely, depending on what you're studying and how.

During the podcast, Brian and I answered these common questions:

» Many people talk about statistical significance, but what does it really mean? » How many people does it take to produce reliable results? » Why do usability tests require many fewer participants than surveys? » How do we know we've gathered enough data from our research?