Professional deformation is the tendency to see things from the point of view of the profession itself rather than having a wider perspective. It can be considered a pun on the concept of vocational training. This implies that vocational training often results in a distortion of the way the world is perceived. The saying "When you have a hammer, everything looks like nails" characterizes this phenomenon.
As a term in psychology, it was probably coined by the Belgian sociologist Daniel Warnotte or Russian-American sociologist Pitirim Sorokin.
Main article: Cognitive biaswiki