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

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G46 – The lack of tactile user feedback also affects the user experience of data input on multi-touch interfaces.

Standard

Guideline:

The  lack  of  tactile  user  feedback  also  affects  the  user experience  of  data  input  on  multi-touch  interfaces.

Guideline Description:

The  lack  of  tactile  user  feedback (Guideline 41) also  affects  the  user experience  of  data  input on  multi-touch  interfaces, for example, typing in a virtual keyboard.

Example:

examplo G46

An user typing in a virtual keyboard with visual feedback.

Source:

Challenges for Designing the User Experience of  Multi-touch Interfaces, 2010

Tags:

Challenge,Feedback, Multi-touch,User Experience.

G41 – There is lack of tactile user feedback.

Standard

Guideline:

There is lack of tactile user feedback.

Guideline Description:

The presence of tactile feedback when a interface is touched is important, giving to user the location of the touchs on user interface.

Example:

examplo G41Identification of touches in the interface provide tactile user feedback.

Source:

Challenges for Designing the User Experience of  Multi-touch Interfaces, 2010
Design Principles to Accommodate Older Adults,2012

Tags:

Challenge, Feedback,Multi-touch.

G14 – The rate at which virtual objects adjust based on subtle hand movements, particularly during resizing and rotating actions, needs to be slowed down.

Standard

Guideline:

The rate at which virtual objects adjust based on subtle hand movements, particularly during resizing and rotating actions, needs to be slowed down.

Guideline Description:

The performing of some gestures, for example resize gesture and rotate gesture should be accompanied with some slowed down in the correspondence of these gestures with interface objects.  The multi-touch interfaces for older adults should include easing or damping in the interaction.

Example:

example_g14This example illustrates the use of resize gesture whose its correspondence with interface objects should be slowed down.

Source:

Exploring the Accessibility and Appeal of Surface Computing for Older Adult Health Care Support,2010
Touch Screens for the Older User,2011

Tags:

Accessibility, Elderly, Feedback, Gestures, Interaction, Multi-Touch.