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Designing an Interface for Disabled user


Designing an Interface ... With the advances of medical science, users who might never have left the hospital before are living independent, productive lives. – PowerPoint PPT presentation

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Title: Designing an Interface for Disabled user

Designing an Interface for Disabled user
  • By Abdi jama
  • Laveeza
  • Ola

  • Interface designers face a new challenge today, a
    challenge that when solved, will not only enable
    them to stretch the boundaries of the technical
    world but also open up the World Wide Web to
    cognitively disabled users. This population is
    both underserved and frequently misunderstood.
    With the advances of medical science, users who
    might never have left the hospital before are
    living independent, productive lives. As part of
    this goal, the Internet must be as accessible to
    them as other common elements of society.

cognitively disabled
  • A person who is cognitively disabled may have  
  • Below average general intellectual functioning.
    The person often has difficulty with problem
    solving, reasoning skills, and understanding and
    using language. 
  • Significant delays in functioning. The person has
    difficulty with reading, math and writing skills.
  • Deficiencies in adaptive behaviour or ability to
    interact with others, and in meeting the demands
    and expectations of the environment.  

Mental Retardation
  • Mental Retardation. A person with an IQ below 70
    (average IQ is 100) having difficulty functioning
    independently is considered to be mentally

Language and Learning Disabilities
  • Language and Learning Disabilities refers to a
    wide range of disorders manifested by significant
    difficulties in listening, speaking, reading,
    writing, reasoning, and calculating/integrating
    perceptual/cognitive information. They are
    presumed to be due to central nervous system

Injury and Stroke/ Alzheimer's Disease
  • Head Injury and Stroke. Head injuries and stroke
    usually result in physical impairments, cognitive
    impairments or both
  • Alzheimer's Disease is a degenerative disease
    that leads to progressive intellectual decline,
    confusion and disorientation.

General Recommendations 
  • After defining the target population, we as web
    designers need to evaluate the needs of the
    cognitively disabled people not viewing them as
    handicapped or plain retarded, but as special
    people with special needs. What we need to
    understand here is that some of the basic
    functions of  memory, thought process, speech
    which ordinary people use as swift reflexes, pose
    great problems for cognitively disabled people
    and we can help them by making this effort a
    little easier.

Ways of helping
  • Website designers should provide a plain language
    description of the website, the purpose of the
    site, and what can be done or learned here
  • The introduction need not be extensive but it
    should be plain and straightforward so that a
    user will know what the website is about

Language and definitions
  • Provide definitions for unusual terms used .
    There are times when designers will need to
    define terms that may not be known to the average
    person. Define the term when it first appears.
    Add an extra sentence explicitly explaining what
    it means.

  • There should be a simple way to backtrack or
    start over while navigating the website to reduce
    anxiety over failure in using it. Similarly to
    provide confirmation to users, any activation of
    a control or change of state should have an
    accompanying auditory indication.

Use of graphics
  • The mainstay of information on the Internet is
    graphics which differentiates it from other
    methods of instruction, making it more
    accessible, and user-friendly. This is one aspect
    that can be suitably exploited to aid people with
    cognitive disadvantages.

  • 1. For input, allow entry of a short code for a
    longer sequence. Simplify required sequences,
    limiting the number of steps.  
  • 2.Use of multiple selection techniques for
    different users with different needs. Use direct
    selection techniques
  • 3.Provide an easy (as well as prominent and
    clear) exit that returns the user to the original
    starting point from any point in the sequence. 
  • 4. Standardize within the website by using same
    shape/colour/icon/label for same function and
  • 5. Commands and features should remain consistent
    from screen to screen. 
  • 6. Shorten menus. 
  • 7. Use pictographic or ideographic symbol system
    that helps such users to construct complex
    sentences, answer and ask questions. 

  •  Think Like               People who are
    disabled should be treated
  • The same as everybody else