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
Now I get it An Article by Ralph Ammer ralphammer.com To design a system means to orchestrate the interplay of its elements. Such a system is considered “interactive” if it is open, which means that there are ways to engage with the processes that are happening inside of it. There is of course a range of interactivities which spans from very basic reactive behaviour to highly complex conversational interactions. systemsinteractionux