Study: Surroundings play key role in diet (AP)

NEW YORK - How many M&MS are enough? It depends on how big the candy scoop is. At least that's a key factor, says a study that offers new evidence that people take cues from their surroundings in deciding how much to eat. It explains why, for example, people who used to be satisfied by a 12-ounce can of soda may now feel that a 20-ounce bottle is just right. It's "unit bias," the tendency to think that a single unit of food — a bottle, a can, a plateful, or some more subtle measure — ...