Here are two posts worth looking at:
(1) First, Ed over at Not Exactly Rocket Science reports on an elegant study on the effects of wearing red in sporting events. Unlike previous studies, many of which have focussed on statistical analyses of real games, this one is a proper experiment, where qualified judges scored tae kwon do matches, shown to them on video. The cool idea was using digital editing to swap the coloured panels on the competitor's kit around, so being able to show an effect for the very same performances. Fighters wearing red got more points.
(2) Then there's a short report over at the BPS research digest, on reduced cognitive performance (especially selective and sustained attention) in subjects engaged in an emergency drill. This helps shed some light on why so many die in emergencies. (There's a related article at Cognitive Daily on working memory and choking under pressure.)