Complexities Of Usability Testing
http://www.stc.org/confproceed/1994/PDFs/PG241242.PDF

Ridgway, Lenore S.
STC Proceedings
1994

Abstract:

Usability testing has proven itself in improving product usability, but actually planning, doing testing, and interpreting results are not always straightforward. Interpretation of the results of usability testing, changes to improves usability, and general inferences to be drawn from specific tests are extremely difficult to make with accuracy. After working through the practicalities and politics of usability testing itself you must then draw conclusions and support them People who have done a lot of testing will find these problems familiar.