This is cross-posted with my Cognitive Science Blog.
Social networking websites are causing alarming changes in the brains of young users, an eminent scientist has warned.
Sites such as Facebook, Twitter and Bebo are said to shorten attention spans, encourage instant gratification and make young people more self-centred.
The claims from neuroscientist Susan Greenfield will make disturbing reading for the millions whose social lives depend on logging on to their favourite websites each day.
But they will strike a chord with parents and teachers who complain that many youngsters lack the ability to communicate or concentrate away from their screens.