"A research has suggested that the best way to solve a complicated problem is to distract yourself for a few minutes with something else or sleep on it overnight.
Those who consciously struggle with a difficult question are more likely to get the wrong answer, compared with those who put it on the mental backburner, experiments show.
Students were asked to choose the best models from four imaginary makes of car.
Each had 12 different features but two had better road holding and fuel economy. After reading about each car, one group of students was asked to make an instant choice.
Another group carried out a second test, which was designed to occupy their minds for five minutes before making their decision."