Originally Posted by _Richard_

there is another study that was posted awhile back.. it was basically turning a classroom into 'superior/inferior' sections for a day, then switching them back..

apparently the days that the 'superior' side was given tests, they performed at a higher cognitive rate than the inferior, and vice versa.. the interesting thing is once the test was over, both sides would perform at the same 'high' level for the rest of the testing done for the year