Methodology of the Tapper et al. (2003) study
1. Researchers used a video of the 'Food Dudes' - a group of four children who gain superpowers from eating vegetables
2. The Food Dudes battle against 'Junk Punks', who threaten to take over the planet by destroying all the fruit and vegetables
3. Throughout the video, fruit and vegetables were eaten regularly
4. Rewards were stickers, pens and erasers, given for eating the target amount of fruit and vegetables
5. This modelling plus rewards approach resulted in increasing fruit and vegetable consumption that persisted at the 15-month follow-up
6. Extended research to a whole school programme with children aged 4-11 in three UK primary schools
7. School staff implemented the programme: Food Dude video, Food Dude rewards, letters from the Food Dudes encouraging children and reminding them how they get rewards, staff manual, briefing video and support materials
8. Children watched videos and listened to letters being read for 16 days, rewards were given to children for tasting target food or eating a whole portion
9. A maintenance phase involved no videos but rewards and letters were used intermittently
10. Two more schools were tested, one received the Food Dudes programme and another acted as a control and simply received extra fruit and vegetables during the study
11. Parents completed questionnaires after the study commenting on whether their child had enjoyed/benefited from the intervention