Table 2.

Quality assessment rating categories for communication apps.

Communication functiona	Categoriesb,c,d
Augmentative and alternative communication	Sound quality: How intelligible is the audio output? Graphic presentation: What is the visual interface quality (image resolution detail [pixels] and image clarity)? Visual interface presentation: What is the overall appeal of the app look (ie, color display, patterns, lines, scale, image/text type, image/text appropriateness, and display options)? Ease of use: Overall, how easy is it to use the software interface (ie, app is intuitive to learn and requires minimal explanation to use; instructions are clear; simple, straightforward display; quick access to common features and commands; well-organized [layout] and easy to navigate)? Customization: How easy is it to customize the app?
Translation	Sound quality Graphic presentation Visual interface presentation Ease of use Translation accuracy: How accurate are the translated words/text

^aThe maximum total score for the final quality assessment ratings=10 (augmentative and alternative communication and translation apps).

^bSound quality, graphic presentation, visual interface presentation, and translation accuracy were rated on a scale of 0 to 2 (0=poor, 1=fair, 2=good).

^cEase of use and customization were rated on a scale of 0 to 2 (0=not at all easy, 1=somewhat easy, 2=easy).

^dSound quality and translation accuracy were only applied in the final quality assessment of purchased/downloaded cApps.