Abstract
A new usability inspection technique based on metaphors of human thinking has been experimentally compared to heuristic evaluation (HE). The aim of metaphors of thinking (MOT) is to focus inspection on users' mental activity and to make inspection easily applicable to different devices and use contexts. Building on classical introspective psychology, MOT bases inspection on metaphors of habit formation, stream of thought, awareness and associations, the relation between utterances and thought, and knowing. An experiment was conducted in which 87 novices evaluated a large Web application, and its key developer assessed the problems found. Compared to HE, MOT uncovered usability problems that were assessed as more severe for users and also appeared more complex to repair. The evaluators using HE found more cosmetic problems. The time spent learning and performing an evaluation with MOT was shorter. A discussion of strengths and weaknesses of MOT and HE is provided, which shows how MOT can be an effective alternative or supplement to HE.
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