The Earliest Of Studies For Speech Sounds Essay example

829 Words May 3rd, 2016 4 Pages
The earliest of studies for speech sounds has been studied intensively since the early 1930s. Studies concerning the acquisition of phonemes are used in clinical practice and serve as a guideline to a practicing clinician. The earliest of studies came from 1931 by Wellman, Case, Mengert and Bradbury. Following Wellman’s findings, other researchers found new material and listing different ages in comparison to Wellman’s research. Sander (1972) discusses the various individuals that contributed to the concept of mastery of sounds, along with also offering criticism to the findings other researchers. There are misconceptions in the concept of age acquisition. Researchers may use percentages or may have a certain criteria to consider when a child has successfully acquired a sound. Through the use of cross-sectional studies, researchers gathered data on the sounds acquired from a group of children in groups similar in age. In Wellman’s findings, a percentage of 75% or greater was used as a scale in which children produced the consonant accurately (Sander, 1972). Wellman presents the acquisition of sounds ranging from three years of age to 6 years of age. Four consonants are not listed with an age in Wellman’s consonant mastery, the sounds without age are, /θ/, /dʒ/, /ʃ/, /ð/. There was no data recorded for the previously listed sounds. Wellman’s norms served as a foundation for other studies that were later performed. Mastery of a sound is generally defined when a child has…

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