Why a Democracy Needs Uninformed People - Miller-McCune
Uninformed people catch a lot of flak in society, whether they’re sitting on decision-making committees, choosing a new PTA president, or voting in a national election. Political commentators often daydream of a fully engaged and 100 percent knowledgeable electorate. New research, though, suggests these know-nothings may be more vital to democracy than anyone has given them credit for.
Researchers at Princeton have discovered that the least informed among us may have a crucial role in tempering the most opinionated minorities. Surprisingly, they started off by studying fish.
Iain Couzin, the lead author on the paper published this week in the journal Science, is actually a professor of ecology and evolutionary biology, not a political or social scientist. His hypothesis about uninformed individuals grew out of a model of animal behavior that tries to capture how, for instance, schools of fish or flocking birds make group decisions.
“One of the key pieces that we’ve been able to elucidate with those types of models is that individuals both influence and are influenced by those with whom they interact,” he said. “Even though they have relatively simple, relatively local interactions, this can give rise to the beautiful coordinated patterns of activities that we see in nature.”
Couzin became interested in how animals potentially manipulate each other within these groups. Animals in a given herd have different preferences — the thirsty ones want to head for a watering hole, for example, while the hungry ones hope to set out for a feeding ground. How does the group decide? Do the hungriest individuals sway everyone else? In nature, there’s a high cost to not reaching consensus. If the group doesn’t make a single decision, it loses many of the advantages of traveling en masse.
To study how this decision-making process works, Couzin and his colleagues applied findings from a series of mathematical models in designing experiments with golden shiner fish. These fish are naturally drawn to the color yellow (Couzin has no idea why this is, although similar phenomena are common in nature). The researchers used this color bias as a stand-in for a “strong opinion” among the fish. In experiments where a minority of fish was trained to swim toward a yellow target, and a majority toward a blue target, the minority swayed the whole group more than 80 percent of the time.
Then the researchers added “uninformed” fish to the mix, and a curious thing happened.