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Table 2 Usability ratings from older adults (n = 4) and individuals with stroke (n = 4)

From: Harnessing smartphone technology and three dimensional printing to create a mobile rehabilitation system, mRehab: assessment of usability and consistency in measurement

Usability items (on a scale of 9) Mean Standard Deviation
Overall reaction - frustration to satisfying 6.6 1.85
Overall reaction - dull to stimulating 6.50 3.12
Ease of reading characters on the screen 7.88 2.10
Clarity on the level of progress 7.43 1.72
Ease of learning to operate the system 8.75 0.46
Clarity of the sequence of screens 8.63 0.74
Clarity of the organization of information 8.5 0.76
Clarity of activity performance 7.57 1.62