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Designing Accessible Systems: Considering Sensory and Physical Differences, Assignments of Computer Science

The importance of designing accessible systems that cater to various sensory and physical differences. It covers the five channels for obtaining information, accessibility for vision and hearing, and accessibility for physical disabilities. The document also touches upon the importance of considering differences such as age, autism, and dyslexia.

What you will learn

  • How can designers ensure accessibility for users with visual differences?
  • What are some physical differences that can affect system design?
  • What are the five channels for users to obtain information?
  • Why is it important to consider accessibility for all users?
  • What are some ways to make systems accessible for users with hearing differences?

Typology: Assignments

2019/2020

Uploaded on 12/08/2020

honey-dayani
honey-dayani 🇬🇧

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System Design

Designing a system is easy to get

wrong!

2018 Snapchat redesign 2004 “Clippy” assistant 2014 Google Glass

  • (^) The study of the interaction between people and computers
  • (^) Includes a number of aspects
    • (^) Visual design of user interfaces
    • (^) Methods for entering input or interacting
    • (^) Physical or psychological limitations users may have
    • (^) User intuition about how to “work” a system
  • (^) Multi-disciplinary: computing, psychology, cognitive science, sociology, product design, graphic design,

HCI – Human Computer Interaction

Information channels

  • (^) There are five channels for users to obtain information
  • (^) Sight, hearing and touch are the most important for HCI
    • (^) Why?
    • Horizon scanning – do you think this will always be the case?
  • (^) Computers can also obtain information from users via these channels - (^) Speech recognition - (^) Gaze tracking - (^) Typing or gesture recognition

Accessibility

  • (^) When designing a system, accessibility for all users must be considered

Physical differences and design

  • (^) Bus stop benches – multiple heights

What other differences?

Autism

What other differences?

Autism Hearing difference

What other differences?

Autism Visual difference Hearing difference Age

What other differences?

Autism Dyslexia Visual difference Hearing difference Age

Accessibility

  • (^) When designing a system, accessibility for all users must be considered
  • (^) Not everybody will be exactly like you!

Sensory factors: Vision

  • (^) Vision is often considered one of our primary senses
  • (^) But there is a wide variation in capability…

Sensory factors: Vision

  • (^) Vision is often considered one of our primary senses
  • (^) But there is a wide variation in capability…
  • (^) Even beyond capability variations, there are factors which can affect our visual acuity - (^) Lighting, glare, contrast, image reflections, readability.
  • (^) People with visual differences may use screen readers

Accessibility for vision

  • (^) Use good colour contrasts
  • (^) Use a readable font size
  • (^) Use a combination of colour, text and shapes (do not distinguish based on only one of these!)
  • (^) Provide text to explain images (alt-text)
  • (^) Design websites to be navigated with keyboards as well as mouse
  • (^) Write descriptive links and headings (“Contact us” vs “Click here”)