Anxiety is also dysfunctional if it is causing physical tension in the body, or if it is generated by a constant stream of self-criticism, which can be self-fulfilling.

WSJ: Anxiety Can Bring Out the Best

"Take the apostrophe, there is so much confusion over how to use it you have to wonder if it has become dysfunctional, " he says.

BBC: NEWS | UK | Magazine | On your marks

The Garden is dysfunctional. if you let Lin walk, you can sign away half of your fanbase to the Brooklyn Nets or the Houston Rockets.

FORBES: Linsanity Turns to Spinsanity: Fumbling Dolan Set to Dump Star as Angry Knicks Fans Organize Online