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Table 2 Evaluative Characteristics of PtDAs Delivered on the Internet [20, 3343]

From: Delivering patient decision aids on the Internet: definitions, theories, current evidence, and emerging research areas

Accessibility of the Technology Refers to the degree to which all people can access the Internet using whichever device they prefer (e.g., computer, laptop, tablet, or mobile phone) regardless of available dial-up/high-speed, Wi-Fi, or mobile phone Internet service. Dissemination strategies to maximize technology accessibility include providing both text-heavy and graphics-heavy versions of a PtDA, as well as versions for multiple screen sizes and mobile phones (known as responsive design).
Universality of the Technology Refers to the degree to which the PtDA is accessible for men and women of all ages, races, ethnicities, religions, languages, and cultures.
Usability of the Technology “…refers to how well users can learn and use a product to achieve their goals and how satisfied they are with that process” (ISO/AWI TR 9241-11, 1998) [43]. This definition includes a combination of factors, primarily focusing on five areas:
1. Ease of Learning - How easy it is to do basic tasks the first time you see the website,
2. Efficiency of Use - How quickly you can use the website once you know how,
3. Memorability - How well you can remember how to use it the next time you visit,
4. Error Frequency - How many errors are typically made in looking for information, and
5. Satisfaction - How much you like using the website.