Tradeoffs in the Design of the IBM Computer Usability Satisfaction Questionnaires
نویسنده
چکیده
Psychometrics is a well-developed field in psychology, and usability researchers began to use psychometric methods to develop and evaluate questionnaires to assess usability a little over ten years ago (Sweeney & Dillon, 1987). The goal of psychometrics is to establish the quality of psychological measures (Nunnally, 1978). Is a measure reliable (consistent)? Given a reliable measure, is it valid (measures the intended attribute)? Finally, is the measure appropriately sensitive to experimental manipulations? Here is a brief review of some basic elements of standard psychometric practice.
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