The experiment was conducted by Newcastle University (UK) recently. In this project two advertising leaflets were printed. The one showed an obscured face while the other one had two watching eyes staring at the beholder. The feeling of being watched deterred the respondents from dropping litter, so that only just under five per cent carelessly dropped the leaflets, while the leaflets with the barely recognisable face were dropped on the ground by over 15 per cent.
The outcome confirms earlier studies conducted by expert at the Centre for Behaviour and Evolution. In a previous study, which took two years in all, the researchers looked at bicycle theft rates and the way they were impacted by posters with clear messages and watching eyes. It was found that whenever the posters were placed around bicycle parking areas, the theft rate fell by 62 per cent during the period under review. On the other hand, this rate went up 63 per cent in parking areas which had been left unchanged, showing that criminal behaviour was merely shifted to different locations, but not prevented.
The study was based on the theory of “nudge psychology” which suggests that people’s behaviour is impacted not so much by straightforward prohibitions but by more subtle factors. This was also confirmed by the Environmental Sciences Department at ETH Zurich, after it had conducted various studies at swimming pools, at football stadiums and in other public spaces. Again and again, it was found that people have a lower psychological barrier to dropping litter when they feel watched. So socially acceptable behaviour is influenced more prominently by images than by straightforward prohibitions – a phenomenon which, according to psychologists, is because people often resent being told what to do. The same is true for socially disadvantaged groups, such as illiterate people or speakers of other languages. They, too, can be reached much better through images than through written warnings. But researchers now want to go further than this study. In the near future they want to look at the way consumers are influenced by fast food packaging with printed images and whether the size of the eyes on the packaging might have any impact.