Feeling Hungry? It Could Be a Mind Game
Memory plays a major role in hunger, scientists found when they measured feelings of fullness in 100 volunteers. Participants were randomly assigned to eat what appeared to be a 10- or 17-ounce bowl of soup. The bowls had been rigged so that the researchers could secretly pump in or drain out soup. Right after eating, participants who had eaten more soup felt fuller. But two to three hours later, those who believed they had eaten a large bowl of soup (but who had really eaten the smaller portion) were less hungry than those who ate from a smaller bowl.
Source: PLOS One, Dec. 5, 2012