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HCIs
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1An HCI is the ways that a [blank_start]human[blank_end] communicates with the [blank_start]computer[blank_end], and how the computer communicates back. Some HCI's serve a special purpose interface designed to meet user needs. For example, CAD terminals for engineering.
Interfaces can include the style of the screen, type of input unit, use of fonts, sound or colour, icons and logos and menus and switchboards.
Expert users would want to complete the task as in the [blank_start]quickest possible time[blank_end]. The novice user would prioritise [blank_start]ease of learning[blank_end]. Novices would want [blank_start]tutorials and on screen help[blank_end], whereas an expert would need [blank_start]shortcuts[blank_end] and access to the [blank_start]Command Prompt[blank_end] to complete the tasks quickly without being bound to windows.
When designing an HCI, 7 things should be considered:
1. [blank_start]Differentiation between users[blank_end]
2. [blank_start]Layout appropriate to task[blank_end]3. [blank_start]Consistency of layout[blank_end] / Sign posting / Pop up information
4. [blank_start]Online and Offline help[blank_end]5. [blank_start]Ease of Use[blank_end]
6. [blank_start]Clear Navigational Structure[blank_end]7. [blank_start]Customisation Options[blank_end]
The most common HCIs are [blank_start]Graphical User Interfaces[blank_end], [blank_start]Command Driven Interfaces[blank_end] and [blank_start]Natural Language Interfaces[blank_end]. An example of a [blank_start]GUI[blank_end] is a [blank_start]WIMP[blank_end] environment, most suitable to non technical uses. [blank_start]GUIs[blank_end] are user friendly, and intuitive to use. However, they require [blank_start]more[blank_end] powerful computers, and the interface is [blank_start]expensive[blank_end] to buy which leads to increased costs.
Command Driven Interfaces, such as [blank_start]MSDOS[blank_end], is often used by computer engineers. This interface is fast taking up [blank_start]little[blank_end] memory, [blank_start]low[blank_end] in cost, and allows for basic tests by engineers without having to boot a GUI. However, they are not user friendly as commands need to be spelled and typed correctly, and the interface needs technical experience.
Forms are often used in [blank_start]databases[blank_end], and are clear intuitive and simple to use. Data can be entered [blank_start]quickly[blank_end], and it is easy to use for less experienced users as no commands need to be learnt. The system usually carries out automatic data [blank_start]validation[blank_end].
Speech recognition is becoming more common, often used by [blank_start]authors[blank_end] to speak books instead of typing. No typing is needed, but computers need to be trained to understand voice and accents, and punctuation must be spoken. Words that sound similar (They're their and there) can also cause problems.
Speech Synthesis is where the [blank_start]computer[blank_end] speaks to the [blank_start]user[blank_end]. Car navigation systems, computer systems designed for blind users and telephone services use this feature. However, the sound is often flat and can be confusing.
Natural Language is an interface that can interpret sentences like constructions. Words can be typed or spoken. Verbs, phrases and clauses act as UI controls for modifying data.
Special Purpose Interfaces control devices such as Mobile Phones, Household appliances (Washing Machines etc.) and Sat Navs etc.
Touch sensitive screens can be used in [blank_start]POS[blank_end] devices. It is advantageous as there is [blank_start]no[blank_end] typing, and data does not need to be remembered. It can also be used at Public information systems, replacing keyboards and mice that can be damaged or stolen.
Biometrics can be used for security, or for taking books out of libraries etc. They are [blank_start]difficult to copy[blank_end], and accurate. there are also no objects to loose such as Smart Cards.- Aquickest possible time
- Bease of learning
- Ctutorials and on screen help
- Dshortcuts
- ECommand Prompt
- FDifferentiation between users
- GLayout appropriate to task
- HConsistency of layout
- IOnline and Offline help
- JEase of Use
- KClear Navigational Structure
- LCustomisation Options
- MGraphical User Interfaces
- NCommand Driven Interfaces
- ONatural Language Interfaces
- PWIMP
- QGUIs
- RGUI
- Smore
- Texpensive
- UMSDOS
- Vlow
- Wlittle
- Xdatabases
- Yquickly
- Zvalidation
- AAauthors
- ABcomputer
- ACuser
- ADPOS
- AEno
- AFdifficult to copy
- AGhuman
- AHcomputer
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- Description
- Quiz on HCIs, created by Jack S on 25/04/2017.
- Author
- Jack S
- Language
- English
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- 3
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