 He also hosts the podcast "The Genius Dialogues", presented by Audible Inc., in which he interviews winners of the MacArthur Fellows Program (often called "Genius Grants").In 2012, Garfield co-founded a podcast about the English language called "Lexicon Valley", presented by Slate, with producer Mike Vuolo.In the January 2, 2013 episode on "creaky voice" in young females, Garfield criticized the phenomenon in emphatic terms.