What does it mean when different physicians disagree about a diagnosis? I am joined by Dr. Shani Herzig as we explore this issue in the second part of my series on the development of diagnosis. We’re going to discuss the advent of signal detection theory in the middle of the 20th century as new diagnostics such as laboratory testing and x-rays started to challenge classical views of diagnosis. If you want to purchase any Bedside Rounds swag, the store is at https://www.teepublic.com/stores/bedsideround