Transcript ppt
Usability 1.0 J. Richard Stevens Rule #1 • “Don’t Make Me Think!” – Orientation vs. Engagement – Conventions and Affordances – Less is more, more or less … • Get rid of questions – Wording – Graphics How we really use the Web • Design vs. Use – Author vs. reader perspective • Reading vs. Scanning – Agenda function • Users don’t make optimal choices. – They “satisfice.” • Users don’t figure, they muddle Designing Billboards • Creating a clear visual hierarchy – Prominence = importance – Relationships between objects – Use recognized conventions • Break up content, add definition • Clickables MUST be obvious • Contrast is key Omit Words • Be concise. • Omit half your words, then omit another half. • Kill “Happy Talk” • Kill instructions Common Problems • • • • No sense of scale No sense of direction No sense of location Why design good navigation? – To give the users something to hold onto – To orient and inform – To build confidence Examples of Bad Design • Busyness – – – • Interface gone awry – – – • http://www.e-tradehub.com/ http://www.havenworks.com/ http://now.sprint.com/widget/ http://www.cleanishappy.com/ http://www.brillpublications.com/ http://www.samanzerin.com/ Bad Communication – – “Conference Hall” or something else? http://www.designofsignage.com/application/symbol/building/applicationpage1.html http://www.designofsignage.com/application/symbol/building/largesymbols/conferencehall.html#Bad%20Design Persistent Navigation • Every page must be consistent – Homepage, forms, etc. • Why we do what others do – Sections and subsections – Utilities – Searching • Street signs as page names – Placement and consistency • Breadcrumbs The End Experience • Always keep in mind the end-user experience • Tailor content to fit into end-user spaces • Consider the environment of use Trunk Testing 1. 2. 3. 4. 5. 6. What site is this? What page am I on? What are the major sections? What are my options? Where am I in the scheme of things? How can I search? Web Team Arguments • “Everybody Likes …” • The myth of the average user • The antidote for religious debate: testing.