Conducted in Portland, Oregon.
APPROVED BY MEMBERS OF THE THESIS COMMITTEE:rdon, Chairperson
RO ert:H:Englis~Oral language sampling and analysis are tools available to the speech-language clinician, which are often helpful in obtaining information regarding the development of expressive language in children. In the past, a child's language has been judged to be mature based upon the length of the utterance and/or the granunatical complexity.The purpose of this investigation was to replicate the study conducted by Lee and Canter (1971) and Lee (1974a) Although slight variation in the examiner's form 3 of elicitation and use of stimulus materials may possibly explain some of the differences found in the grammatical categories, it appears an unlikely possibility that this variation could account for the statistically significant difference found between the mean DSS scores of the two studies.In addition, the differences do not appear to be the result of stimulus materials or transcription methods used.The norms compiled by Lee (1974a) in the Midwest, differ significantly from those obtained in this study, conducted in Portland, Oregon. It appears likely that score differences in other geographical areas may exist as well.In order to conduct a thorough and competent evaluation of a child's expressive language abilities, the data from this investigation reflect the need for the speech-language clinician to use the DSS norms cautiously and/or to establish norms specific to a geographical region.