Powers of Ten: The Users Experience

I have been thinking a lot about web design and user interfaces lately and so I found this article about perception, time and user experience really fascinating.

0.1 second is the response time limit if you want users to feel like their actions are directly causing something to happen on the screen. For example, if you click on an expandable menu and see the expanded version in less than 0.1 seconds, then it feels as if you made the menu open up. If it takes longer than 0.1 seconds for the revised state to appear, then the response doesn’t feel “instantaneous” — instead, it feels as if the computer is doing something to make the menu open.

via: webcomics.com