In MULTIPLICITY, Rita Carter - award-winning science writer and international speaker - offers a new and vital understanding of personality. Rita explains that nearly every one of us is a team of personalities, working together, for the most part, to give the impression of a unified self. We are used to thinking of ourselves as one thing or the other - either introvert or extrovert, say - but things are rarely that simple for most of us. That's why we sometimes feel like a different person depending on mood, company and surroundings, why we sometimes suffer unaccountable memory lapses, why we buy something we then decide we didn't want in the first place, or why 'somebody else' turns off the alarm clock in the morning.