4
votes
2answers
301 views

When to adjust for frequency of use in satisfaction surveys that use intercept sampling?

A well-known issue in "intercept" sampling is that it is not a probability sample of the customer population. If you were a grocery store interviewing 1/20 shoppers as they exit the store, for ...
8
votes
7answers
1k views

How to measure self reported computer proficiency? Ideally with one item

For a usability test, I'd like to have a simple measure for computer proficiency, to be able to see, whether it has an impact on successfully handling the tasks. How can we best measure that? A ...