The Pew Research Center in Washington says Americans believe their fellow Americans have become fat -- but not themselves.

The Pew survey says most everyone considers obesity a serious national problem. But when they think about weight, they apparently use different scales for different people.

Some 9-in-10 American adults surveyed by Pew said most of their fellow Americans are overweight. But 7-in-10 say most people they personally know are overweight. And 39 percent admit they are overweight.

The sliding assessments are drawn from a Pew Research Center telephone survey conducted Feb. 8-March 7 among a randomly selected, representative national sample of 2,250 adults. Officials did not provide a margin of error estimate.

Copyright 2006 by United Press International