Input and Output Devices. I/O Devices: Input information data An input device together with appropriate software, transforms information from the user.

Slides:



Advertisements
Similar presentations
Ease of Access and Assistive Technology on Windows 7 Computer Access for Individuals with Visual Impairments.
Advertisements

Input and Output Devices. I/O Devices: Input information data An input device one that, together with appropriate software, transforms information from.
Assistive Technology in Public Libraries
R OLE OF I NFORMATION AND C OMMUNICATION TECHNOLOGY (ICT) IN LIFE OF P ERSONS WITH L OCOMOTOR D ISABILITY Dr. Dharmendra Kumar Director Pandit Deendayal.
Interaction Devices By: Michael Huffman Kristen Spivey.
Copyright 1999 all rights reserved Input Devices n What types are there? n Why do we need them? –What functions do they perform? n What are desirable characteristics.
STANDARD AND DIRECT. At the end of this session students will: List the typical input devices Identify the types of input devices List their characteristics.
Chapter 12: AccessibilityCopyright © 2004 by Prentice Hall User-Centered Website Development: A Human- Computer Interaction Approach.
ICS 463, Intro to Human Computer Interaction Design: 9 “Theory”. Input and Output Dan Suthers.
Class 6 LBSC 690 Information Technology Human Computer Interaction and Usability.
Chapter 31 Exploring Windows XP Vol. 1 Part Three – Customization: Personalizing Windows XP.
Interaction Devices: Input Devices
Chapter 4: Configuring the Windows Vista Desktop.
People & Devices: (Inputs & Outputs) Startlingly small child using computer History of human-computer interaction Another history video.
Input and Output Devices. I/O Devices: Input information data An input device one that, together with appropriate software, transforms information from.
ICT has enabled disabled people to carry out many tasks that were only carried out by people with no disabilities.
Input Devices Text Entry Devices, Positioning, Pointing and Drawing.
Discussion Silvia Lindtner INF 132 April 07. Fitts’ law - recap A predictive model of time to point at an object Help decide the location and size of.
Input devices, processing and output devices Hardware Senior I.
Hardware Specialised Devices
Lesson Objectives To understand that users with disabilities require different input and output devices To be able to identify these devices and explain.
Assistive Technology Ability to be free. Quick Facts  Assistive technology is technology used by individuals with disabilities in order to perform functions.
Standard Grade Computing COMPUTER STUDIES Standard Grade INPUT DEVICES Chapter 16.
 At the end of this class, students are able to  Describe definition of input devices clearly  List out the examples of input devices  Describe.
By Sophie Baxter, Amyar Razi, Jamal Mouhoun, Saavin Abeygunawardena and Shahrukh Yousef.
Input devices are hardware components that enable users to interact with a computer. Without input devices, you would not be able to feed instructions.
   Input Devices Main Memory Backing Storage PROCESSOR
The Computer Input devices Output devices Input/output devices VR Memory Processing Dix et al chapter 2.
Chapter 12: AccessibilityCopyright © 2004 by Prentice Hall Issues Involving Vision Range Total blindness Impaired vision Color blindness Photosensitive.
1 12. Accessibility After studying this chapter you will Be aware of the major barriers to accessing the Web Become familiar with assistive technologies.
. X.A Computers help businesses, schools, and individuals at home to operate more efficiently. This efficiency can take the form of working more quickly,
ASSISTIVE TECHNOLOGY PRESENTED BY ABDUL BARI KP. CONTENTS WHAT IS ASSISTIVE TECHNOLOGY? OUT PUT: Screen magnifier Speech to Recogonizing system Text to.
Assistive Technology Jamaal Hunter. What is it? Assistive technology (often abbreviated as AT) is any item, piece of equipment, software or product system.
Week 7.  Definition, policies, standards  Continuum of abilities.
How People With Disabilities Use the Web Larry G. Hull Accessibility Engineer.
11.10 Human Computer Interface www. ICT-Teacher.com.
Unit 1_9 Human Computer Interface. Why have an Interface? The user needs to issue instructions Problem diagnosis The Computer needs to tell the user what.
Accessing the Keyboard Jessica Cassellius April LaCoursiere Meghan Neu.
What is it, and how does it help our students? Assistive Technology helps improve participation and understanding in the classroom for students with disabilities.
Alternative Access When an individual has a motor control and/or a visual disability, alternative input devices may be needed. Emphasize…try to adapt standard.
MarkNotes Question 1 The Human Computer Interface (HCI) is an important part of an ICT system. Describe four factors which should be taken.
Input By Hollee Smalley. What is Input? Input is any data or instructions entered into the memory of a computer.
ACCESSIBILITY By Josh Allen. DEVICES THAT PEOPLE CAN USE.
ED 505 Melanie Shotts March 28, 2015
Keyboard  Used to input data into application software.  Used for typing in commands to the computer (e.g. Ctrl + P for printing)  The keys are arranged.
Peter Norton, 6 th edition By: Rena Essa. Lesson 3A:Using the Keyboard and Mouse.
Microsoft Assistive Technology Products Brought to you by... Jill Hartman.
E.g.: MS-DOS interface. DIR C: /W /A:D will list all the directories in the root directory of drive C in wide list format. Disadvantage is that commands.
KAMI KITT ASSISTIVE TECHNOLOGY Chapter 7 Human/ Assistive Technology Interface.
Windows Accessibility Options. 2 Keyboard Options StickyKeys For people who have difficulty holding down two of more keys at a time Enables user to press.
1 Human Computer Interaction Week 5 Interaction Devices and Input-Output.
Assistive Technology November 14, Screen Reader Who uses screen readers? –People with little to no vision What is it? –A form of “Assistive Technology”
Interacting with your Computer Chapter 2 Learning Objectives Identify five key groups on standard computer keyboard Name six special purpose keys.
+ Assistive Technology By Lyndsay RHodes. + Screen Reader A screen reader is a software application for people with severe visual impairments. A screen.
Touch Screen, Head Mouse and Eye Gaze. Alternatives to the mouse & keyboard One alternative to the keyboard and mouse is a touch screen monitor Particularly.
1 Interaction Devices CIS 375 Bruce R. Maxim UM-Dearborn.
MarkNotes Question 1 The Human Computer Interface (HCI) is an important part of an ICT system. Describe four factors which should be taken.
Human Computer Interaction Lecture 4 The Computer.
AS Level ICT Selection and use of input devices and input media: Simple devices.
Lecture Input Devices Keyboard. Mouse Microphone Digital Camera Scanner.
Standard Methods of Input.
Methods of Computer Input and Output
11.10 Human Computer Interface
How People with Disabilities Access the Web
Input Devices Text Entry Devices
Starter Describe any 2 technologies that help public to share their political views. [4] Page 105 in your textbook.
MTTS: Standard Six Assistive Technology
Building your class website
Designing HCI’s for a specific purpose.
Accessibility.
Presentation transcript:

Input and Output Devices

I/O Devices: Input information data An input device together with appropriate software, transforms information from the user into data that the computer application can process. usability Choice and method of use of an input device should contribute positively to the usability of the system feedback by the system The usability of an input device depends greatly on the provision of appropriate feedback by the system

Types of Keyboard Qwerty Qwerty keyboard Uses most common alphabetic character arrangement Good for variable data entry and flexible. Fast for trained touch typists. Slow for non-typists Keyboards for other languages use different layouts Chord – Can be used for texting on mobiles Chord – Can be used for texting on mobiles Various arrangements. Words are formed by combinations of key presses – fewer keys – smaller What size do the keys need to be? What shape should it be? How robust should it be

Pointing devices Two types of pointing devices Indirect – user uses a secondary device Direct – Allow users to point directly users tasks Various characteristics and features may suit different users or for different tasks Eyesheadsfeet hands Eyes, heads and feet can be used to control computers as well as hands

Pointing devices: Indirect 3D tracker 3D tracker Relays position and orientation to a receiver. Replaces mouse where desk space is limited (e.g., laptops) Joystick Joystick Small stick, movable in any direction in a fixed socket. Mouse Mouse continuous input device. Buttons for discrete input. Relative device. Trackball Trackball (a.k.a. “dead mouse”) Rotatable ball in fixed socket Tablet Tablet used with stylus or puck. Absolute device Mole Mole (a.k.a. “foot mouse”)

Pointing devices: Direct Touch-sensitive screen Touch-sensitive screen Special screen that detects the position of a finger touching it. – i.e Interactive White Board Pen Systems Uses a touch screen but users select using a pen/stylus rather than using their finger – i.e Dsi Note: Dsi can be touch screen or pen.

Developments in input Speech recognition Speech recognition advantages: minimal user training, freedom of hands etc., opportunities for physically disabled disadvantages: recognition system often needs training, liable to error; subject to interference from background noise; difficult for application to interpret human speech Handwritten input Handwritten input advantages: easier to separate words, may need some training for users disadvantages: cursive script difficult to read, wide variety of handwriting styles, system may need training Dataglove Dataglove Communicates hand and finger position to an application. Used for manipulating virtual objects

Output devices feedback from the computer Output devices provide information or feedback from the computer in a form which is understandable by humans Visual Display Unit Visual output, in 2-D, using a Visual Display Unit (VDU) is by far the most common form.

Issues Involving Vision Range Total blindness Impaired vision Color blindness Photosensitive epilepsy Technologies: Screen readers – reads out the text aloud Screen magnifier Braille Descriptive audio – adds description to the audio

Refreshable Braille display

A screen magnifier: the right portion here

Colour Blindness – Red peppers or Green peppers? This is how they are seen by a colour blind person

Avoid Red Text on Green Background

Issues Involving Mobility/Motor Impairment Conditions that affect a person’s ability to use keyboard and mouse effectively Can be caused by: Diseases: arthritis, muscular dystrophy, multiple sclerosis Stroke Injury Loss of limb Repetitive strain injury Natural aging processes

Assistive technologies available in Windows StickyKeys permits one-finger typing Press Shift, Ctrl, or Alt followed by another key, rather than pressing two keys at same time FilterKeys helpful for people with hand tremors or problems with fine-motor control Ignores brief or repeated keystrokes MouseKeys permits moving pointer with the numeric keypad SerialKey permits access, via serial port or USB port, to alternatives for mouse and keyboard functions Foot mouse

The Eyegaze TM system

Eyegaze ® A video camera tracks eye movement as the user looks at an on-screen keyboard Customisable as to how long a key must be looked at to be recorded When system has identified the key looked at, the symbol appears and the user looks at next key

Issues Involving Hearing Impairment Deafness Hard of hearing Can be caused by prolonged exposure to noisy environments Hearing often degrades with age

Closed captioning

An avatar signs from English text See asl.cs.depaul.edu for more information and a demo. The project is led by Dr. Rosalee Wolfe.

Choosing appropriate devices work/purpose Match the devices with work/purpose The device chosen needs to be able to accomplish the piece of work or purpose it is intended for users Matching devices with users e.g., eye and head input for the physically disabled Child, adult environment of use Matching devices with environment of use space relation to other concurrent tasks etc.,