What do circles, squares and stick figures have do to with effective business communication? According to management consultant Dan Roam, doodles and drawings are the among the best ways to convey information because most people are visual learners. In his new book, Draw to Win: A Crash Course on How to Lead, Sell and Innovate with Your Visual Mind , Roam says anyone can use visual communication — no art degree needed. He recently appeared on the on the Knowledge at Wharton show  on Wharton Business Radio on SiriusXM channel 111 to discuss why the brain excels at processing information when pictures are part of the message. An edited transcript of the conversation follows. Knowledge at Wharton: What was the impetus for this book? Dan Roam: I am a business guy who comes out of an art background. I have drawn all my life, starting as a little kid. If you think about it, most of us have drawn when we were very young. I just kept on doing it.…