Appendix E Subjective Usability Scales for Software (SUSS)

The Subjective Usability Scales for Software (SUSS) instrument, originally devised for our research on usability metrics, has been used by a number of clients and students to evaluate user interface designs. The sample form that follows is a template for the questionnaire that may be copied freely.

To turn the SUSS template into a workable questionnaire, the placeholder at the top must be replaced by a sketch, screen shot, or other representation of the part of a user interface being evaluated. A series of four representative task scenarios must be devised and incorporated into questions 6 through 9.

To score the SUSS, subtract 1 from the response to each question for the first five ...

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