People size you up in seconds, but what exactly are they evaluating? Harvard Business School professor Amy Cuddy has been studying first impressions alongside fellow psychologists Susan Fiske and Peter Glick for more than 15 years, and has discovered patterns in these interactions. In her new book, "Presence," Cuddy says people quickly answer two questions when they first meet you: Can I trust this person? Can I respect this person? Psychologists refer to these dimensions as warmth and competence respectively, and ideally you want to be perceived as having both. Interestingly, Cuddy says that most people, especially in a professional...