A Picture is Worth 1,000 Calories - (Audio)

A police cheif brings food to work every time his picture gets in the paper. How does this relate to what we know about behavior modification?

http://splendidtable.publicradio.org/www_publicradio/tools/media_player/popup.php?name=splendid_table/2009/12/25/splendidtable_20091225_64&starttime=00:35:41&endtime=00:34:40