High Quality Content by WIKIPEDIA articles! The Dodo bird verdict is a controversial phenomenon in psychology which states that all psychotherapies, regardless of their specific components, produce equivalent outcomes. The term originates from Lewis Carroll`s novel Alice`s Adventures in Wonderland, but the verdict originated from the work of Saul Rosenzweig in the 1930s. There are many controversies about this verdict because of the issues associated with testing the idea. The verdict is important, however, because of the many implications for psychology and the many different psychotherapies available for clients.