Motivational posters can have behavioral effects. For example, Mutrie and Blamey,[4] of the University of Glasgow and the Greater Glasgow Health Board, found in one study that their placement of a motivational poster that promotes stair use in front of an escalator and a parallel staircase, in an underground station, doubled the amount of stair use. These studies all support the finding that such motivational posters, placed at the point of decision, can have a behavioral effect, with this effect decreasing back to zero gradually over a period of weeks after the removal of the poster.[5]