Jonah Lehrer explains why daydreaming makes you smarter and more creative:
a hundred and forty-five undergraduate students were given a standard test of creativity known as an “unusual use” task, in which they had two minutes to list as many uses as possible for mundane objects such as toothpicks, bricks, and clothes hangers.
Subjects were then given a twelve-minute break. During this time, they were randomly assigned to three different conditions: resting in a quiet room, performing a difficult short-term memory task, or doing something so boring that it would elicit mind-wandering. Following this interlude, the subjects were given another round of creative tests, including the unusual-use tasks they had worked on only a few minutes before.
Here’s where things get interesting: those students assigned to the boring task performed far better when asked to come up with additional uses for everyday items to which they had already been exposed. Given new items, all the groups did the same. Given repeated items, the daydreamers came up with forty-one per cent more possibilities than students in the other conditions.
What does this mean? Schooler argues that it’s clear evidence that those twelve minutes of daydreaming allowed the subjects to invent additional possibilities, as their unconscious minds pondered new ways to make use of toothpicks. This is why the effect was limited to those items that the subjects had previously been asked about—the question needed to marinate in the mind, “incubating” in those subterranean parts of the brain we can barely control.
On a more practical note, the scientists argue that their data show why “creative solutions may be facilitated specifically by simple external tasks that maximize mind-wandering.” The benefit of these simple tasks is that they consume just enough attention to keep us occupied, while leaving plenty of mental resources left over for errant daydreams. (When people are left alone, such as those subjects forced to sit by themselves, they tend to perseverate on their problems. Unfortunately, all this focus backfires.) Consider the ping-pong tables that now seem to exist in the lobby of every Silicon Valley startup. While it’s easy to dismiss such interior decorations as mere whimsy, the game turns out to be an ideal mind-wandering activity, at least when played casually. Another task that consistently leads to extended bouts of daydreaming is reading Tolstoy. In Schooler’s earlier work on mind-wandering, he gave subjects a boring passage from “War and Peace.” The undergraduates began zoning out within seconds.
Although Schooler has previously demonstrated a correlation between daydreaming and creativity—those who are more prone to mind-wandering tend to be better at generating new ideas, at least in the lab—this new paper shows that our daydreams seem to serve a similar function as night dreams, facilitating bursts of creative insight. Take a 2004 paper published in Nature by the neuroscientists Ullrich Wagner and Jan Born. The researchers gave a group of students a tedious task that involved transforming a long list of number strings into a new set of number strings. Wagner and Born designed the task so that there was an elegant shortcut, but it could only be uncovered if the subject had an insight about the problem. When people were left to their own devices, less than twenty per cent of them found the shortcut, even when given several hours to mull over the task. The act of dreaming, however, changed everything: after people were allowed to lapse into R.E.M. sleep, nearly sixty per cent of them discovered the secret pattern. Kierkegaard was right: sleeping is the height of genius.