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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G74 – Provide a cursor showing clearly the selected target. It should be obvious to older adults what can be selected and what cannot.

Standard

Guideline:

Provide a cursor showing clearly the selected target. It should be obvious to older adults what can be selected and what cannot.

Guideline Description:

Older adults tend to lose attention frequently, so in a user interface it is important identifying which element on the screen is being currently selected. Older adults also presenting a reduced  working memory causing difficulty in the tasks that  involving reasoning,  which include the ability to understanding what the user can and cannot do, and the ability to remembering the steps required to complete a task. Because of this, in a user interface should be obvious what can be selected and what cannot by older adults.

Example:

exemplo G74This example uses a yellow highlight to distinguish the selected item in the menu.

Illustration adapted from Design Recommendations for TV User Interfaces for Older Adults: Findings from the eCAALYX Project

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
Design Recommendations for TV User Interfaces for Older Adults: Findings from the eCAALYX Project,2012

Tags:

Affordance , Design, Elderly, Layout,  Selection, Target Design

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.

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.

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.