Published on 18 Jul 2009. Tagged with psychology.
From a Times Online article about a study by psychologist Richard Wiseman who "lost" a few hundred wallets with different or no pictures in them:
When faced with the photograph of the baby people were far more likely to send the wallet back, the study found. In fact, only one in ten were hard-hearted enough not to do so. With no picture to tug at the emotions, just one in seven were sent back.