THE SPEECH-DISORDERS-CLASSIFICATION-SYSTEM (SDCS) - EXTENSIONS AND LIFE-SPAN REFERENCE DATA

A companion paper includes rationale for the use of: 10 metrics of art iculation competence in conversational speech (Shriberg, Austin, Lewis , McSweeny, & Wilson, 1997). The present paper reports lifespan refere nce data for these measures using records from a total of 836 3-to 40-year-old speakers with normal and disordered speech. The reference da ta are subdivided by diagnostic classification based on extensions to an instrument titled the Speech Disorders Classification System (SDCS; Shriberg, 1993). Appendices provide procedural information on the SDC S and statistical rationale for the reference data.