Date posted: 25/04/2012
Posted by: Site Administration
This story is from the category The Brain
Advertisers and public health officials may be able to access hidden wisdom in the brain to more effectively sell their products and promote health and safety, UCLA neuroscientists report in the first study to use brain data to predict how large populations will respond to advertisements.
Thirty smokers who were trying to quit watched television commercials from three advertising campaigns, which all ended by showing the phone number of the National Cancer Institute's smoking-cessation hotline. They were asked which commercials they thought would be most effective; they responded that advertising campaigns "A" and "B" would be the best and "C" would be the worst.
The UCLA researchers also consulted experts who work in the anti-smoking field and who have been involved in creating anti-smoking advertisements. These experts agreed that campaigns "A" and "B" were the best and "C" was the worst.
While the smokers watched the advertisements, they underwent functional magnetic resonance imaging (fMRI) brain scans at UCLA's Ahmanson-Lovelace Brain Mapping Center, and the neuroscientists focused on part of the medial prefrontal cortex -- located in the front of the brain, between the eyebrows -- a region that they have found to be especially important in previous persuasion studies.
The researchers found that activity in the medial prefrontal cortex increased much more during advertising campaign "C" than it did during campaign "A," and somewhat more than it did during campaign "B."
"The medial prefrontal cortex predicted 'C' would be the best, 'B' would be second best and 'A' would be the worst -- essentially the opposite of what the experts and the participants told us they thought would happen," said the study's senior author, Matthew Lieberman, a UCLA professor of psychology and of psychiatry and biobehavioral sciences.
"We didn't expect how radically different people's predictions would be from the predictions we made based on their brain activity," said Lieberman, one of the founders of social cognitive neuroscience. "We had people telling us one thing and this brain region telling us something diametrically opposed.