SE234: Human Computer Interaction Chapter 2-4
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Questions and Answers

What is the primary advantage of QWERTY keyboards for experienced users?

  • They provide a more ergonomic design
  • They allow for faster typing
  • They are more visually appealing
  • They enable rapid entry of text (correct)

    • What is the historical reason for the QWERTY layout?

  • To prioritize alphanumeric keys
  • To slow down typing to avoid mistakes
  • To make typing more ergonomic
  • To prevent typewriters from jamming (correct)

    • What is a characteristic of interactive computing?

  • Line printer output
  • Rapid feedback and user control (correct)
  • Long wait times for processing
  • Batch processing

    • What type of keyboards are arranged in alphabetic order?

    <p>Alphabetic</p> Signup and view all the answers

    What is a common feature of modern text input devices?

    <p>Wireless connectivity</p> Signup and view all the answers

    What is a limitation of QWERTY keyboards?

    <p>They are not optimal for typing</p> Signup and view all the answers

    What is a type of device that can be used for text entry?

    <p>Handwriting devices</p> Signup and view all the answers

    What is a characteristic of alternative keyboard layouts?

    <p>They are not faster for trained typists</p> Signup and view all the answers

    What are the components of a computer system?

    <p>All of the above</p> Signup and view all the answers

    What is crucial to understand about computers in human-computer interaction?

    <p>What goes in and out</p> Signup and view all the answers

    What determines the style of interaction in a computer system?

    <p>The devices used</p> Signup and view all the answers

    What is an example of a physical interaction device?

    <p>Haptic device</p> Signup and view all the answers

    What is an example of a virtual reality device?

    <p>Special interaction and display device</p> Signup and view all the answers

    What is an example of an output device?

    <p>Screen (small &amp; large)</p> Signup and view all the answers

    What is a common component of a 'typical' computer system?

    <p>Monitor</p> Signup and view all the answers

    What are examples of devices that can be considered computers?

    <p>All of the above</p> Signup and view all the answers

    What is a characteristic of the Dvorak keyboard layout?

    <p>Common letters are placed under the dominant fingers</p> Signup and view all the answers

    What is a disadvantage of the Dvorak layout?

    <p>There is a large social base of QWERTY typists that resist the change</p> Signup and view all the answers

    What is the purpose of special keyboards designed for RSI?

    <p>To reduce fatigue</p> Signup and view all the answers

    What is a characteristic of chord keyboards?

    <p>They are compact in size and ideal for portable applications</p> Signup and view all the answers

    How does T9 predictive entry work?

    <p>All of the above</p> Signup and view all the answers

    What is a challenge of handwriting recognition?

    <p>All of the above</p> Signup and view all the answers

    Where is handwriting recognition commonly used?

    <p>PDAs and tablet computers</p> Signup and view all the answers

    What is a benefit of handwriting recognition?

    <p>It allows for natural interaction</p> Signup and view all the answers

    Study Notes

    The Computer

    • A computer system consists of various elements that affect interaction, including input devices, output devices, virtual reality, physical interaction, paper, memory, and processing.

    Interacting with Computers

    • To understand human-computer interaction, it's essential to understand what computers can do, including their devices, paper, sensors, memory, processing, and networks.

    A Typical Computer System

    • A typical computer system consists of an screen, keyboard, and mouse/trackpad, with variations such as desktop, laptop, and PDA.
    • The devices used dictate the styles of interaction that the system supports.

    Prevalence of Computers

    • Computers are ubiquitous, with many devices in our homes and pockets, including PDAs, PCs, laptops, phones, cameras, TVs, and more.

    Interactivity

    • Long ago, computing was based on batch processing, but now most computing is interactive, with rapid feedback and user control.
    • Interactivity allows users to do rather than think.

    Richer Interaction

    • Modern computing involves richer interaction, with sensors and devices everywhere.

    Text Entry Devices

    • Text entry devices include keyboards, chord keyboards, phone pads, and handwriting/speech recognition devices.

    Keyboards

    • Keyboards are the most common text input device, allowing rapid entry of text by experienced users.
    • Keyboards have a standardized layout, such as QWERTY, but alternative designs are available.

    QWERTY Layout

    • The QWERTY layout is not optimal for typing, as it was designed to prevent typewriter jamming.
    • Alternative designs, such as Dvorak, offer faster typing and reduced fatigue, but are not widely adopted due to the large social base of QWERTY typists.

    Alternative Keyboard Layouts

    • Alternative layouts, such as alphabetic and Dvorak, offer improved typing speed and reduced fatigue.
    • Special keyboards, such as those designed for single-handed use or to reduce fatigue, are also available.

    Chord Keyboards

    • Chord keyboards have a few keys and use combinations of keypresses to type letters.
    • They are compact, easy to learn, and fast, but may cause fatigue and face social resistance.

    Phone Pad and T9 Entry

    • Phone pads and T9 entry use numeric keys with multiple presses to type letters.
    • T9 predictive entry uses a dictionary to guess the correct word, allowing fast typing.

    Handwriting Recognition

    • Handwriting recognition allows text input using a pen and a digitizing tablet.
    • Technical problems include capturing useful information, segmenting joined up writing, and interpreting individual letters.
    • Handwriting recognition is used in PDAs and tablet computers.

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    Related Documents

    Week 6 -8- the Computer.pdf

    Description

    Understanding HCI concepts, including input devices, output devices, virtual reality, physical interaction, and paper. These elements affect human-computer interaction in various ways.

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