GCSE A451 - Input devices

Question 1

Describe 3 input devices for people with disabilities explaining how they would be used.

Answer 1

• Puff-suck switch: allows mobility impaired users to
  control eg clicking a mouse, by sucking or blowing
  through a tube
• Simplified/concept keyboards eg for Braille, or larger
  keys
• Eye tracking input – Camera is used to follow the
  users eye movements and use these to control eg
  movement of mouse on screen.
  A foot mouse can be used by a person who has limited or no use in their upper arms.
  -Foot mouse - can be used to navigate through software programs and select things in much the same way as a conventional mouse.
• Predictive text -The technology allows words to be entered by a single keypress for each letter. Instead of having to type out the whole word, the software tries to predict the most likely word that you want.

Question 2

State what is meant by an input device.

Answer 2

device used to enter data into the computer