Do you dream in black and white? If so, the chances are you are over 55 and were brought up watching a monochrome television set.
New research suggests that the type of television you watched as a child has a profound effect on the colour of your dreams.
While almost all under 25s dream in colour, thousands of over 55s, all of whom were brought up with black and white sets, often dream in monchrome – even now.
So, Mathieu, what do your dreams look like?