Researchers have discovered that merely posting photocopies of eyes in a room makes people behave more honestly. “Eyes are known to be a powerful perceptual signal for humans. People behave more cooperatively when they are being ‘watched’ by a cute image of a robot or even abstract ‘eye spots’ on a computer screen. But this is the first time anyone has observed the effect in a natural situation, with people using their own money. It could have far-reaching implications.”