Not done Sir, but doing.

Plenty is doing.

"[The present] studies provide direct evidence that individual differences in impulsivity are associated with [faster response times and higher error rates in all but the final, response-execution stage of information-processing]."

S.J.DICKMAN & D.E.MEYER, 1988, Journal of Personality & Social Psychology 54.

Disclaimer: this quote appears here only to spark discussion. It is not endorsed one way or the other. Make up your own mind. Or just refresh the page for another viewpoint. From a collection assembled by the late Chris Brand.