Keith talks with psychiatrist & genetics researcher Dr. Michael Escamilla, Director of the Center of Excellence for Neurosciences at Texas Tech University Health Sciences Center, Paul L. Foster School of Medicine. Escamilla talks about the symptoms of schizophrenia, and how some people suffering from the disorder can live fairly normal lives while others encounter difficulty fitting in socially. He also talks about the search for genes that may increase risk for schizophrenia, and why the disorder is not caused solely by genetic factors, but by environmental ones as well. Aired May 12, 2013.