thanks runspired. I think you are referring to the Yerkes-Dodson law - http://en.wikipedia.org/wiki/Yerkes%E2%80%93Dodson_law http://en.wikipedia.org/wiki/Yerke

thanks runspired. I think you are referring to the Yerkes-Dodson law - http://en.wikipedia.org/wiki/Yerkes%E2%80%93Dodson_law http://en.wikipedia.org/wiki/Yerkes%E2%80%93Dodson_law interesting idea