Jeffrey Alan Lieberman (born 1948) is an American psychiatrist who specializes in schizophrenia and related psychoses and their associated neuroscience (biology) and drugs. He was principal investigator for CATIE, the largest and longest independent study ever funded by the United States National Institute of Mental Health to examine existing therapies for schizophrenia. He was past president of the American Psychiatric Association from May 2013 to May 2014.Lieberman is the Lawrence E.