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Sampling Topics

7 S's of User Research Sampling

Jeff Sauro • March 13, 2012

Rarely can we talk to all users in the population we're studying, instead we sample. Here are 7 S's to help in your sampling: Simple Random, Starbucks, Stratified, Snowball, Spot, Sequential and Serial sampling.[Read More]

Do you need a random sample for your usability test?

Jeff Sauro • May 12, 2010

You don't need a random sample to use statistics to make better decisions from your usability data. You do need to know if the users who aren't in your usability tests are different enough than those who are.[Read More]