I just love this Google I/O 2013 talk on human perception and cognition, and its implications for interactive and visual design. It is accessible, but with a lot of information and applies very well to us I think. I'm sure that many designers know all about this and some have probably seen the clip before, but it is also very good for developers, because many of these things we know subconsciously, but it's not really part of our vocabulary. https://www.youtube.com/watch?v=z2exxj4COhU DJ