Talking to yourself used to be considered the first sign of madness.
But thinking out loud is actually the best way to get things done and could help us solve tricky tasks, scientists claim.
A study found we are far better at problem-solving when we think out loud, making 78 per cent fewer errors than if we silently puzzle things out in our heads.
A researcher at Nottingham Trent University asked 35 people to play a complicated card game, which involved spotting patterns in sequences of numbers, colours and shapes.
The pack contained 48 cards and to make things harder, the pattern kept changing.