“…15. These vocalizations have been called "phonetically consistent forms" (Dore, Franklin, Miller, & Ramer, 1976), "indexical signs" (Dore, 1986), "sensorimotor morphemes" (Carter, 1979), "protowords" (Halliday, 1975;Menn, 1976;Menyuk & Menn, 1979), and "quasiwords" (Stoel-Gammon & Cooper, 1984). 16.…”