Adriane M. Donkers, Jo W. Tombaugh, Richard F. Dillon. Observer accuracy in usability testing: the effects of obviousness and prior knowledge of usability problems. In Dennis R. Wixon, editor, Posters and Short Talks of the 1992 SIGCHI Conference on Human Factors in Computing Systems, CHI 1992, Monterey, California, USA, May 3-7, 1992. pages 127-128, ACM, 1992. [doi]
Abstract is missing.