Dan Ariely, author and professor of psychology and behavioural economics, at Duke University, North Carolina, the US, studies the irrational ways in which we all behave. In his own words, he “looks at people not from a rational perspective, but from the irrational perspective. We basically ask questions around what we are doing that is not in our long-term best interest”. In an interview with Nidhi Sinha, Editor, Outlook Money, as part of the Wealth Wizards series, he talks about himself, his signature half a beard, how people can deal with irrationality, and the role of emotions like misbelief, trust, and human motivation in how people behave or make decisions. Here are the edited excerpts from the interview.