Nod the noggin

When you nod your head to show approval or shake your head to show disapproval, it's not just sending a message to others - you may also be influencing yourself. A recent study has shown that these simple movements influenced people's agreement with an editorial they heard while nodding or shaking their head. Researchers found that other body movements - such as writing with a non-dominant hand - can also influence attitudes, even about important issues such as self-esteem.

I've just seen my boss nodding, i'm off to see about a pay rise...