• Small text Medium text Large text
  • Default colours Black text on white background Yellow text on black background
Cardiac-eu.org

Checklist for Touchscreens

No significant benefits No significant benefits
Minor benefits Minor benefits
Major benefits Major benefits
User Groups
Visual
Hearing
Physical
Cognitive
Ageing
           

Screens

         
The touch screen is shielded from sunlight
Major benefits visual
Major benefits hearing
Major benefits physical
Major benefits cognitive
Major benefits ageing
The screen is angled towards the horizontal to provide arm/wrist support
Major benefits visual
Major benefits hearing
Major benefits physical
Major benefits cognitive
Major benefits ageing
The screen is perpendicular to the line of sight
Major benefits visual
No significant benefits hearing
Major benefits physical
No significant benefits cognitive
Minor benefits ageing
The text and background colour combination is of high contrast
Major benefits visual
No significant benefits hearing
No significant benefits physical
Minor benefits cognitive
Major benefits ageing
Use of blue, green and violet is kept to a minimum
Major benefits visual
No significant benefits hearing
No significant benefits physical
No significant benefits cognitive
Major benefits ageing
There is no noticeable flicker on the screen
Major benefits visual
No significant benefits hearing
No significant benefits physical
Minor benefits cognitive
Major benefits ageing
The structure of the visual display allows the user to predict where to find information and how to use it
Major benefits visual
No significant benefits hearing
No significant benefits physical
Major benefits cognitive
Major benefits ageing
           
Controls          
Touch sensitive areas or keys are between 20 - 22mm across*
Major benefits visual
No significant benefits hearing
Major benefits physical
Minor benefits cognitive
Major benefits ageing
For mobile devices with touchscreens targets are 9.2 - 9.6mm across**
Major benefits visual
No significant benefits hearing
Major benefits physical
Minor benefits cognitive
Major benefits ageing
Graphical symbols are accompanied by text
Minor benefits visual
No significant benefits hearing
No significant benefits physical
Major benefits cognitive
Minor benefits ageing
There is a high contrast between touch areas, text and background colour
Major benefits visual
No significant benefits hearing
No significant benefits physical
Minor benefits cognitive
Major benefits ageing
Text or controls are not placed over a background image or a patterned background
Major benefits visual
No significant benefits hearing
No significant benefits physical
Minor benefits cognitive
Major benefits ageing
White or yellow type on a black or dark colour background is used
Major benefits visual
No significant benefits hearing
No significant benefits physical
Minor benefits cognitive
Major benefits ageing
Controls are labelled in a large high contrast font
Major benefits visual
No significant benefits hearing
No significant benefits physical
Minor benefits cognitive
Major benefits ageing
Audible output or tactile output is provided for identification of controls and for results of activating controls
Major benefits visual
Major benefits hearing
No significant benefits physical
No significant benefits cognitive
Minor benefits ageing
An inactive space of at least 1mm is provided around each target
Minor benefits visual
No significant benefits hearing
Major benefits physical
No significant benefits cognitive
Minor benefits ageing
Labels are easily distinguishable from controls
Major benefits visual
No significant benefits hearing
No significant benefits physical
Minor benefits cognitive
Major benefits ageing
Controls are operable by a mouthstick, headstick or other similar device
No significant benefits visual
No significant benefits hearing
Major benefits physical
No significant benefits cognitive
Minor benefits ageing
Commands can be entered by voice
Major benefits visual
No significant benefits hearing
Major benefits physical
Minor benefits cognitive
Minor benefits ageing
The height of the active areas on the screen is between 800mm and 1200mm
No significant benefits visual
No significant benefits hearing
Major benefits physical
No significant benefits cognitive
Minor benefits ageing
The system provides a clear control that permits the user to go back a step
Major benefits visual
Major benefits hearing
Major benefits physical
Major benefits cognitive
Major benefits ageing
Controls are positioned on the screen in a way that is consistent with their functions
Minor benefits visual
No significant benefits hearing
No significant benefits physical
Major benefits cognitive
Minor benefits ageing
All labels and instructions are in short simple sentences
Minor benefits visual
No significant benefits hearing
No significant benefits physical
Major benefits cognitive
Minor benefits ageing
Text versions of audio prompts are synchronised
No significant benefits visual
Major benefits hearing
No significant benefits physical
Major benefits cognitive
No significant benefits ageing
There is speech output for on-screen instructions
Major benefits visual
No significant benefits hearing
No significant benefits physical
Minor benefits cognitive
Minor benefits ageing
Existing colour conventions are adhered too, for e.g. red for stop
Minor benefits visual
No significant benefits hearing
No significant benefits physical
Major benefits cognitive
Minor benefits ageing
           
Help facilities          
Guidance is distinguishable from other displayed information
Major benefits visual
Major benefits hearing
Major benefits physical
Major benefits cognitive
Major benefits ageing
Information is relative to the task rather than a generic message
Major benefits visual
Major benefits hearing
Major benefits physical
Major benefits cognitive
Major benefits ageing
Multi-modal help is offered
Major benefits visual
Major benefits hearing
Major benefits physical
Major benefits cognitive
Major benefits ageing
Users can switch off help prompts if they are not required
Major benefits visual
Major benefits hearing
Major benefits physical
Major benefits cognitive
Major benefits ageing
Audio messages are short and simple
Major benefits visual
No significant benefits hearing
No significant benefits physical
Minor benefits cognitive
Minor benefits ageing
Abbreviations are not used in audio messages
Major benefits visual
No significant benefits hearing
No significant benefits physical
Major benefits cognitive
Minor benefits ageing
Users can interupt the help facility and return to the task
Major benefits visual
Major benefits hearing
Major benefits physical
Major benefits cognitive
Major benefits ageing

*According to Namahn (2000), touch sensitive areas or keys, for users with no impairments, should be of a "minimal size: 22mm across". However, Colle & Hiszem (2004) recommend that a "key size no smaller than 20mm...should be used if sufficient space is available". See Touchscreens guideline for references.

**According to Parhi, Karlson and Bederson (2006), for one-handed thumb use of mobile handheld devices equipped with a touch-sensitive screen "target size of 9.2mm for discrete tasks and targets of 9.6mm for serial tasks should be sufficiently large...without degrading performance and preference". See Touchscreens guideline for references.

Checklist for Controls
Checklist for Displays
Checklist for Keys