24 Questions
What is the primary advantage of QWERTY keyboards for experienced users?
They enable rapid entry of text
What is the historical reason for the QWERTY layout?
To prevent typewriters from jamming
What is a characteristic of interactive computing?
Rapid feedback and user control
What type of keyboards are arranged in alphabetic order?
Alphabetic
What is a common feature of modern text input devices?
Wireless connectivity
What is a limitation of QWERTY keyboards?
They are not optimal for typing
What is a type of device that can be used for text entry?
Handwriting devices
What is a characteristic of alternative keyboard layouts?
They are not faster for trained typists
What are the components of a computer system?
All of the above
What is crucial to understand about computers in human-computer interaction?
What goes in and out
What determines the style of interaction in a computer system?
The devices used
What is an example of a physical interaction device?
Haptic device
What is an example of a virtual reality device?
Special interaction and display device
What is an example of an output device?
Screen (small & large)
What is a common component of a 'typical' computer system?
Monitor
What are examples of devices that can be considered computers?
All of the above
What is a characteristic of the Dvorak keyboard layout?
Common letters are placed under the dominant fingers
What is a disadvantage of the Dvorak layout?
There is a large social base of QWERTY typists that resist the change
What is the purpose of special keyboards designed for RSI?
To reduce fatigue
What is a characteristic of chord keyboards?
They are compact in size and ideal for portable applications
How does T9 predictive entry work?
All of the above
What is a challenge of handwriting recognition?
All of the above
Where is handwriting recognition commonly used?
PDAs and tablet computers
What is a benefit of handwriting recognition?
It allows for natural interaction
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.
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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