[[Book - Laws of UX - Using Psychology to Design Better Products and Service]] Productivity soars when a computer and its users interact at a pace (<400 ms) that ensures that neither has to wait on the other. Key Takeaways - Provide system feedback within 400 ms in order to keep users’ attention and increase productivity. - Use perceived performance to improve response time and reduce the perception of waiting. - Animation is one way to visually engage people while loading or processing is happening in the background. - Progress bars help make wait times tolerable, regardless of their accuracy. - Purposefully adding a delay to a process can actually increase its perceived value and instill a sense of trust, even when the process itself actually takes much less time. ---- - Providing feedback to users to engage users - loading bar, progress bar etc. - When content is loaded slow, disruptive and break the productively flow. Walter J. Doherty and Ahrvind J. Thadani, “The Economic Value of Rapid Response Time,” IBM technical report GE20-0752-0, November 1982, http://www.utsa.edu/mind/von_restorff_translation.htm. - - Skeleton Loading Page - - Loading Bar - anything longer than 10 sec, people will do other things. - Optimistic UI - like Facebook - Comments are "posting"... it shows feedback. When the speed is too fast, the user doesnt know what has happened. Slowing it down makes the people think that it's important and instil trust