I enjoy the mix of economics and psychology, which is why I am a faithful reader of the Freakanomics blog. Their recent podcast on “pain” started off with a good human-factors-related tale of the problematic design of a subway alarm system. I have included a link below to the podcast, but the quick overview is that there is an ear piercing alarm that is triggered by using the “emergency” exit, which is invariably used every day by someone wanting to get out faster than turnstiles permit.
The person breaking the rules has to hear the alarm for the shortest period of time and face no repercussions. The law abiding citizens waiting in line to exit get to listen to the alarm the longest.
Photo Credit Wavebreaker @ Flickr