The act of making a forecast causes a person to act differently in the future.&nbsp; See <a href="search.pl?p=self-fulfilling prophesy">self-fulfilling prophesy</a>, <a href="search.pl?p=self-defeating prophesy">self-defeating prophesy</a>, and <a href="search.pl?p=unobtrusive measure">unobtrusive measure</a>. <o:p></o:p></P>