The people who hold the most extreme views opposing genetically modified foods think they know the most about food science, but actually know the least, according to new research published in the peer-reviewed Nature Human Behaviour.
Marketing and psychology researchers asked more than 2,000 U.S. and European adults for their opinions about GM foods (better know in the public sector simply as GMOs). The surveys asked respondents how well they thought they understood genetically modified foods, then tested how much they actually knew with a battery of true-false questions on general science and genetics.
Despite a scientific consensus that GM foods are safe for human consumption and have the potential to provide significant nutritional benefits, many people oppose their use. More than 90 percent of study respondents reported some level of opposition to GM foods.
The paper’s key finding is that the more strongly people report being opposed to GM foods, the more knowledgeable they think they are on the topic, but the lower they score on an actual knowledge test.
“This result is perverse, but is consistent with previous research on the psychology of extremism,” said Phil Fernbach, the study’s lead author and professor of marketing at the Leeds School of Business. “Extreme views often stem from people feeling they understand complex topics better than they do.”
A potential consequence of the phenomenon, according to the paper’s authors, is that the people who know the least about important scientific issues may be likely to stay that way, because they may not seek out — or be open to — new knowledge.
The paper was a collaboration between researchers at the University of Colorado Boulder, Washington University in St. Louis, the University of Toronto, and the University of Pennsylvania.
The paper’s authors also explored other issues, like gene therapy and climate change denial. They found the same results for gene therapy.
However, the pattern did not emerge for climate change denial. The researchers hypothesize that the climate change debate has become so politically polarized that people’s attitudes depend more on which group they affiliate with than how much they know about the issue.