G89 – Use a big button size.

Standard

Guideline:

Use a big button size.

Guideline Description:

The use of big button size in applications for older adults has two purposes, the first purpose serves to help people with vision impairments in noticing the button and the second purpose serves to help people with motor problems in pressing button accurately.

Some button sizes are recommended, for example a button for a finger selection is recommended at least 20 mm square, meanwhile buttons with 20mm by 31.7 mm are more appealing to users. Minimum recommended button size is 10mm, for older adults 11.43 mm, a slightly larger. Relatively the space of the buttons is recommended a space between 3.17 mm and 12.7 mm to lower performance error rates for older adults.

Example:

exemplo G89An example of an application with large buttons.

Source:

Using the Android Tablet to Develop a Game Platform for Older Adults, 2011
Touch Screens for the Older User,2011
Design Principles to Accommodate Older Adults,2012
Touch Screen User Interfaces for Older Adults: ButtonSize and Spacing,2007

Tags:

Accessibility, Buttons, Content, Elderly, Large-Elements,  Motor, Vision , Target Design.

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G43 – Different physical properties have to be considered while designing the interface (e.g. size of buttons).

Standard

Guideline:

Different  physical  properties have  to  be  considered  while  designing  the  interface  (e.g. size  of  buttons).

Guideline Description:

Different users have different physical characteristics.  The different  physical  properties should be considered  in the design of the  interface  (e.g. size  of  buttons).

Example:

examplo G43

An example of a touch-screen interface, with large buttons.

Source:

Challenges for Designing the User Experience of  Multi-touch Interfaces, 2010
Touch Screens for the Older User,2011
Touch Screen User Interfaces for Older Adults: Button Size and Spacing,2007

Tags:

Buttons,Challenge,Content, Elderly, Layout,Motor, Multi-touch, Target Design.