Lambda Pi Eta is the official communication studies honor society of the National Communication Association (NCA). As a member of the Association of College Honor Societies, LPH has over 500 active chapters at four-year colleges and universities worldwide. LPH represents what Aristotle described in his book, Rhetoric, as the three ingredients of persuasion: Logos (Lambda) meaning logic, Pathos (Pi) relating to emotion, and Ethos (Eta) defined as character credibility and ethics. LPH was founded in 1985 at the University of Arkansas. LPH became a part of the National Communication Association (NCA) in 1988, and the official honor society of the NCA in July 1995.