Human-Computer Interaction & web design
Principle 7: Size and Space for Approach and Use
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| Principle 7: Size and Space for Approach and Use Appropriate size and space is provided for approach, reach, manipulation, and use regardless of user's body size, posture, or mobility. Guidelines: 7a. Provide a clear line of sight to important elements for any seated or standing user. 7b. Make reach to all components comfortable for any seated or standing user. 7c. Accommodate variations in hand and grip sized. Provide adequate space for the use of assistive devices or personal assistance. Universal design multi modal vs. multimedia Multi-modal – use more than one sense or mode of interaction. It provides access to system information and functionality through different range of input and output channel. The 5 senses used to interact. Such as visual and aural sense a text processor may speak the word as well as echoing them to the screen Multimedia – use a number of different media to communicate information. Such as video, animation, text, graphics. Universal design – class discussion Is our university website supports 7 seven universal design principles How would you recommend improving the site ▪ How would you suggest a website to be more older people friendly? USER SUPPORT What is user support User support system is a process of providing various assistance to user available any required time. Basic requirements Available but unobtrusive – accessible anytime during the interaction - Accurate and robust – incremental updates / what’s new - Consistent and flexible – allow user to get the information in an appropriate form User support -types Quick reference – use as a reminder to the user for the details of the tools. Such as a command option associated with syntax Task- specific help – explains how to apply the tool to address a particular problem Full explanation – used when an advanced user may require detailed explanation of tool Tutorial – aimed to assist new users and provided step by step instruction. User support -approaches ■ Command assistance – users requests help on a particular command and presented with a help screen. E.g. Unix man, DOS help, windows help. It is good for quick reference. ■ Command prompts – it provides information when error occurs. ■ Context sensitive help – used in menu based system to provide help. Such as tips, Online tutorials – the user gets how the application works, task can be repeated anytime needed. Such as ‘how-to’s’, ‘FAQ’ ■ Online documentation – printed material in electronic form, hypertext can support browsing. ■ Wizards – it is a task-specific tool, allow user to complete the task quickly, safely and accurately. Assistance – monitors user behavior and suggest corresponding hits, recognize familiar sequences. Designing user support systems User support system is not an add-on, it is integral part of the system. It should be addressed like designing any other system. The same modelling and analytical techniques to be applied. the designer should consider the content of the help and the context in which it will be used before the technology that will be required. Presentation Issues How is help requested How is help displayed Implementation Issue What physical constraints does the machine impose in terms of screen space, memory capacity and speed? How the help data is to be structured? Designing user support systems Effective presentation for help systems – ■ Help and tutorial material should be written in clear, familiar language, avoiding jargon as much as possible It should not make assumptions about what the user knows in advance It present both instructional and descriptive information clearly Where needed, breaking the documentation into clear logical sections, or by using technology such as hypertext to organize it Each topic in the documentation should be described using the same format so that the user knows whereto look fora particular type of information. |