G113 – Minimize the number of steps it takes to reach a given screen.

Standard

Guideline:

Minimize the number of steps it takes to reach a given screen.

Guideline Description:

The steps should be simple and number of steps needed to achieve a given screen should be minimized, fostering a good navigation. An useful way of presentation is through of the use of a hierarchy and grouping of information into meaningful categories, focusing only the most relevant items.

Avoid

Complex, multi-step process.
Procedures inconsistent with established practice.
A deep hierarchy.

Example

example g113Examples of well-designed hierarchy menus.

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

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

Tags: Content, Elderly, Layout,  Memory, Navigation, Screen

G111 – Avoid some gestures in the multi-touch interaction.

Standard

Guideline:

Avoid some gestures in the multi-touch interaction

Guideline Description:

The use of some  gestures in the multi-touch interaction can be difficult to performing by the older adults, namely the most complex gestures, due to  some physical changes associated with the aging. Rotate gesture is an example of a difficult to perform gesture.

Example:

g111-example1

Elders using rotate gesture during a testing session.

Illustration adapted from Exploring the Accessibility and Appeal of Surface Computing for Older Adult Health Care Support

Source:

Designing touch-based interfaces for the elderly,2010
Exploring the Accessibility and Appeal of Surface Computing for Older Adult Health Care Support,2010
Tabletop Sharing of Digital Photographs for the Elderly,2006
Touch Panel Usability of Elderly and Children, 2014

Tags:

Accessibility, Elderly, Gestures, Interaction, Multi-touch

G110 – Error messages should be simple and easy to follow.

Standard

Guideline:

Error messages should be simple and easy to follow.

Guideline Description:

In the presence of an error, the system should describe the occurrence explaining how to recover, without blaming the user by  this situation, once older adults are more prone to blame themselves for errors, because they  have low experience with technology. Their motor skills also influence the occurrence of errors. The language employed in the error messages should be understandable by older adults.

Avoid:

Unclear error messages.
Using of inappropriate language.

Example:

example g110

A good example of an error message.

Source:

Designing touch-based interfaces for the elderly,2010
Design Recommendations for TV User Interfaces for Older Adults: Findings from the eCAALYX Project,2012

Tags:

Elderly, Errors, Feedback, Motor, Navigation

G109 – Use medium or bold face type, e.g., Sans Serif type font,i.e., Helvetica, Arial. Avoid other fancy font types.

Standard

Guideline:

Use medium or bold face type e.g. sans serif type font i.e. Helvetica, Arial. Avoid other fancy font types.

Guideline Description:

Selecting an appropriate font type is crutial in a design of user interface for the older adults. Using sans serif fonts, such as, Arial Helvetica Century Gothic, facilitates the  reading of texts on the screen. The size of  font type should be large or preferably adjustable.

Recommended

Sans Serif:          Arial           Helvetica     Century Gothic

Size recommended for body text:  12pt or 14 pt

Avoid

Script Fonts and decorative fonts that are difficult to read.
Use of font types with serifs.

Example:

example g109Text examples using as font size, 12 and 14 points.

Source:

Designing touch-based interfaces for the elderly,2010
Design Principles to Accommodate Older Adults,2012
Design Recommendations for TV User Interfaces for Older Adults: Findings from the eCAALYX Project,2012


Tags:

Design, Elderly, Font Type, Layout, Reading,  Text,Vision.

G108 – Main body of the text should be in sentence case and not all capital letters.

Standard

Guideline:

Main body of the text should be in sentence case and not all capital letters.

Guideline Description:

Writing of text should use the sentence case and avoid the use of the uppercase. Meanwhile, the uppercase can be used to draw attention of some text parts, example: UPPERCASE DRAWS ATTENTION.

Avoid:

Uppercase should not be used for long text blocks.

Example:

example g108

Example of texts using uppercase and sentence case.

Source:

Designing touch-based interfaces for the elderly,2010
Design Principles to Accommodate Older Adults,2012

Tags:

Design, Elderly, Layout, Reading, Text, Vision.

G107 – The text should be double spacing between the lines.

Standard

Guideline:

The text  should be double spacing between the lines.

Guideline Description:

The ideal text spacing for older adults in body text is double-spaced; this format increases the readability and legibility.

Example:

example g107_

This example shows the use of double-spaced text.

Source:

Designing touch-based interfaces for the elderly,2010

Tags:

Design, Elderly, Layout, Legibility, Reading, Text, Vision.