The post, Root Causes of Crunch Mode [the broken link was removed] from the Game Manager blog makes the good point that
A good article on this topic is, Managing Fear by Gerald Suarez (who I worked with for several years). There are also 3 videos on this topic by Dr. Suarez, available from Management Wisdom, the producers of the Deming Library videos [the broken link was removed]. I must admit I didn’t really understand the effects of fear and anxiety on performance until hearing Dr. Suarez speak on the topic many years ago.
From the Managing Fear article:
Fear also produces questionable data, as people tend to focus on eliminating the threat instead of working to achieve the desired positive outcomes.
See previous post: Targets Distorting the System