Are you right or left-handed... or both?

This was the question the researchers were trying to find the answer to. They wanted to see if handedness is related to how accident-prone a person is.

It seems that most people are not solely right-handed, or solely left-handed. Depending on the task they may switch their dominant hand without even knowing. You may only ever write with your left hand, but which hand do you use to unscrew a jar, pick up a mug or sharpen a pencil? We are all ambidextrous to a certain degree.

In the past it has been suggested that left-handed people are more accident-prone. This now seems unlikely and psychologists think the classification of handedness was to blame. It seems that people had been classified as either right-handed, or left-handed - there was no category for people who used both hands. All these mixed-handers were lumped together with the left-handers.

This study aimed to tease out the three groups - left-handers, right-handers and mixed-handers to see whether mixed-handers are more accident-prone.