Director: Carol Stoel-Gammon, Ph.D.   Infant Vocalization Study As well as supervising a diverse group of doctoral students, Dr. Stoel-Gammon is exploring of the use of video of other babies babbling to elicit vocalization in 7- and 9-month old infants.          Stimulability and Treatment Amy Glaspey studies stimulability as a dynamic assessment of phonological change.        Classifying Speech Disorders of Unknown Origin Beate Peter studies naturally occurring subtypes of childhood speech disorders, by collecting a variety of data from an unlabeled sample of children with such disorders, then applying clustering algorithms to these data.         Acquisition of Korean Stops Minjung Kim and Dr. Stoel-Gammon study the acoustic characteristics of Korean stops in Korean child-directed speech and the acquisition of Korean stops by Korean children.                Lexical Effects in Phonological Acquisition Anna Sosa studies the effects of word frequency, neighborhood density, and age-of-acquisition on phonological accuracy and variability in typically developing toddlers.         Vowel Overlap Amber Franklin studies the productions of the high-front vowels from nine children from 21 to 33 months of age. Vowel overlap is analyzed in 2-D and 3-D space.         Bilingual VOT & Vowels Andrea MacLeod studies the production and perception of VOT and vowels by early and late bilinguals.