Doughnuts & pizzas are very distracting

But after eating chocolate, people were not distracted by high-calorie food images any more

Fatty and sugary food such as doughnuts and pizzas are almost twice as distracting as healthy food until you have eaten some of it, according to a study. The study underscored people's implicit bias for fatty, sugary foods.

Researchers at Johns Hopkins University in the US created a complicated computer task, in which food was irrelevant, and asked a group of participants to find the answers as quickly as possible. As the participants worked diligently, pictures flashed in the periphery of the screen - visible only for 125 milliseconds, which is too quick for people to fully realise what they just saw.

The pictures were a mix of images of high-fat, highcalorie foods, healthy foods, or items that were not food. Researchers noted that all of the pictures distracted people from the task, but found that items like doughnuts, potato chips, cheese and candy were about twice as distracting.

The healthy food pictures like carrots, apples and salads - were no more distracting to people than non-foods like bicycles, lava lamps and footballs, researchers said. The team then recreated the experiment, but had a new group of participants eat two fun-sized candy bars before starting the computer work.

Researchers found that after eating the chocolate, people were not distracted by the high-fat, high-calorie food images any more than by healthy foods or other pictures. "So we showed them carrots and apples, and it slowed them down. We showed them bicycles and thumb tacks, and it slowed them down. But when we showed them chocolate cake and hot dogs, these things slowed them down about twice as much," said Howard Egeth, professor at Johns Hopkins University.