John McCarthy (born 1953 in Medford, Massachusetts) is a linguist and professor of phonology at the University of Massachusetts, Amherst. He was educated at Harvard University and MIT and was responsible, along with Alan Prince, for extending Optimality Theory to morphology. Image File history File links Jjm3. ... Image File history File links Jjm3. ... Medford is a city in Middlesex County, Massachusetts just a few miles north of Boston on the Mystic River. ... Broadly conceived, linguistics is the scientific study of human language, and a linguist is someone who engages in this study. ... Phonology (Greek phone = voice/sound and logos = word/speech), is a subfield of linguistics closely associated with phonetics. ... The center of the UMass Amherst campus. ... Harvard University is a private university in Cambridge, Massachusetts, USA, and a member of the Ivy League. ... The Massachusetts Institute of Technology, or MIT, is a research and educational institution located in the city of Cambridge, Massachusetts, USA. MIT is a widely renowned leader in science and technology, as well as in many other fields, including engineering systems, management, economics, linguistics, political science, and philosophy. ... Alan Prince is a professor of Linguistics at Rutgers University. ... Optimality theory or OT is a linguistic theory proposed by the linguists Alan Prince and Paul Smolensky in 1993. ... Morphology is a subdiscipline of linguistics that studies word structure. ...