First International Conference on Spoken Language Processing (ICSLP 90)
Maximum syllable repetition task was performed for three age groups (young, middle, and elderly healthy adults) under different bite-block conditions (BB; None, 10mm, 20mm) to examine effects of age of speaker, size of BB, and CV syllable on the rate and regularity of articulatory movement. Maximum repetition rate (MRR) decreased as a function of age, while articulatory jitter (AJ) , syllable-to- syllable variations in duration which was applied as an index of the irregularity, showed no significant differences. The effect of bite-block was significant for both MRR and AJ. Larger size of BB was associated with smaller MRR and larger AJ. The reduction of MRR as a function of the size of BB was the largest for (ta) and the smallest for (ka).
Bibliographic reference. Kariyasu, Makoto / Maruyama, Kukiko (1990): "Aging in the rate and regularity of maximum syllable repetition under bite-block", In ICSLP-1990, 609-612.