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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G72 – Provide large targets.

Standard

Guideline:

Provide large targets.

Guideline Description:

Vision impairments verified in the older adults require large targets in the user interface to be noticed by older adult and also for an accurate selection.

Example:

exemplo G72

An example of an application with large targets.

Source:

Healthcare TV Based User Interfaces for Older Adults, 2010
Designing touch-based interfaces for the elderly,2010
Touch Screens for the Older User,2011

Tags:

Accessiblity, Elderly, Large-Elements, Layout, Target Design.

G11 – Address special aspects associated with tabletop user interfaces

Standard

Guideline:

Address special aspects associated with tabletop user interfaces.

Guideline Description:

The use of large display in order to enable to reach whole table easily and the use as social spaces, are some examples of special aspects that can be addressed in tabletop user interfaces.

Example:

example_g11

Checkers is an example of a familiar game played by older adults, in their social interaction.

Source:

Tabletop Sharing of Digital Photographs for the Elderly,2006

Tags:

Accessibility,  Adaptability, Elderly, Large-elements, Layout, Learnability, Multi-Touch.

G10 – Support user in reducing clutter.

Standard

Guideline:

Support user in reducing clutter.

Guideline Description:

The use of large interface elements and reducing distraction of the current focus helps in reducing clutter.

Example:

example_g10
A pair of elderly users using an interface with large elements.

Illustration adapted from Tabletop Sharing of Digital Photographs for the Elderly

Source:

Tabletop Sharing of Digital Photographs for the Elderly,2006

Tags:

Accessibility, Adaptability, Elderly, Large-Elements, Learnability,  Multi-touch, Testing.

G8 – Ensure the user can easily make interface elements larger (adjustable).

Standard

Guideline:

Ensure the user can easily make interface elements larger (adjustable).

Guideline Description:

The use of large interface elements or through a mechanism that aims to adjust the size of interface elements according to the user preferences,  eases the readability and understanding  of the user  interface, especially for users with some visual impairments.

Example:

example_g8 - Cópia

This example shows an user increasing the size of the interface elements.

Source:

Tabletop Sharing of Digital Photographs for the Elderly,2006
Touch Screens for the Older User,2011
Design Principles to Accommodate Older Adults,2012

Tags:

Accessibility, Adaptability, Elderly, Large-elements, Layout, Legibility, Learnability, Reading, Understanding, Vision, Target Design.