Table 2. Severity scoring of usability and problems based on a set of SMArtphone's uSability Heurestics (SMASH) [14].

S: five point rating scale of severity (0 = I don't agree that this is a usability problem at all, 1 = Cosmetic problem only: does not need to be fixed unless extra time is available on project, 2 = Minor usability problem: fixing this should be given low priority, 3 = Major usability problem: important to fix, so should be given high priority, 4 = Usability catastrophe: imperative to fix this before product can be released), P: number of usability problems.

^aExperts: 1 computer scientist, 1 nursing professor whose major was nursing informatics, and 1 digital media designer. ^bAs the mean of usability problems, it excluded overlapping problems among experts.