How well do you understand yourself? For investors, it is an important question. We're co-conspirators in self-deception and this prevents us from having accurate self-knowledge. This does not lead to good results in the markets.  To explain, Barry Ritholtz welcomes David Dunning to the podcast. Dunning is a professor of psychology at the University of Michigan. Dunning’s research focuses on decision-making in various settings. In work on economic games, he explores how choices commonly presumed to be economic in nature actually hinge more on psychological factors, such as social norms and emotion.