Human-centered design


processes of perception The act of perception is a fast, but complex task



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processes of perception

  • The act of perception is a fast, but complex task.



sensory memory: processing & interpretation



feature analysis: design implications



special issues: icons



rules of thumb: icons



visual search & detection

  • Understanding how humans search and detect visual information suggest strategies for interface and graphic design

    • Humans tend to search through elements on a screen in either a serial or parallel fashion looking for a targets
  • The time it takes to locate a target (the desired menu item, page content, etc. ) depends upon a few variables:

    • The number of items on a screen – serial search; Neisser: T=(NI)2
    • Element conspicuity – parallel; things that stand out are located faster and elements noticed in parallel
    • logical content organization and expectancies



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