Website Response Times An Article by Jakob Nielsen www.nngroup.com Users really care about speed in interaction design...A snappy user experience beats a glamorous one, for the simple reason that people engage more with a site when they can move freely and focus on the content instead of on their endless wait. 0.1 seconds gives the feeling of instantaneous response. This level of responsiveness is essential to support the feeling of direct manipulation. 1 second keeps the user's flow of thought seamless. 10 seconds keeps the user's attention. A 10-second delay will often make users leave a site immediately. uxperformanceinteraction
The ground plane Whereas Corbusier relegated streets to traffic functions, the ground plane represented to Van Eyck the realm in which people 'learn' cities. The placement of benches and bollards, the height of stepping-stones, the ill-defined separations of sand, grass, and water are all tools in that learning, an education in ambiguity. Richard Sennett, The Craftsman If children are transferred from a lively city street