- Category: Annotations
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Discusses System Usability Scale (SUS; Brooke, 1996). Did a ten year longitudinal study; found high reliability. Questions how SUS score describes product usability (is 50% enough? or 75-100?). DId a pilot study in which academic letter grading system applied instead of percentage (A exceptional, C acceptable)
SUS uses 5 pt Likert (SD ->SA)
Adjective Rating Scale: (Worst Imaginable to Best Imaginable)
Added Adjective Rating Scale to bottom of same page; filled out immediately after.
Seems to argue that results statistically significant, but standard deviation is upwards of 10 points (though it would keep in range of grades)
Suggest using as subjective label for mean SUS score, perhaps using in place of SUS, but researchers caution against.
Word "ok" too variable.
Looking to correlate to letter grades.