“…The underlying theoretical orientation of this research was that understanding the nature of the input to children would be critical to understanding how children develop language. A series of crosslinguistic studies thus investigated the features of caregivers' (especially mothers') talk to infants and young children, with a focus on the phonological patterns resembling immature child speech and the special baby talk lexicon (Casagrande, 1948;Chew, 1969;Cruttenden, 1994;Ferguson, 1964Ferguson, , 1977Grimes, 1955;Shankara Bhat, 1967). These studies, carried out with transcription data, not instrumental analysis, reported baby talk patterns to include consonant cluster reduction, consonant harmony (place or nasality), consonant fronting, labialization, replacement of rhotics, stopping of fricatives, and initial or final deletion.…”