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  • Title: Lingual kinematic strategies used to increase speech rate: comparison between younger and older adults.
    Author: Goozée JV, Stephenson DK, Murdoch BE, Darnell RE, Lapointe LL.
    Journal: Clin Linguist Phon; 2005 Jun; 19(4):319-34. PubMed ID: 16019778.
    Abstract:
    The primary objective of this study was to assess the lingual kinematic strategies used by younger and older adults to increase rate of speech. It was hypothesised that the strategies used by the older adults would differ from the young adults either as a direct result of, or in response to a need to compensate for, age-related changes in the tongue. Electromagnetic articulography was used to examine the tongue movements of eight young (M = 26.7 years) and eight older (M = 67.1 years) females during repetitions of /ta/ and /ka/ at a controlled moderate rate and then as fast as possible. The younger and older adults were found to significantly reduce consonant durations and increase syllable repetition rate by similar proportions. To achieve these reduced durations both groups appeared to use the same strategy, that of reducing the distances travelled by the tongue. Further comparisons at each rate, however, suggested a speed-accuracy trade-off and increased speech monitoring in the older adults. The results may assist in differentiating articulatory changes associated with normal aging from pathological changes found in disorders that affect the older population.
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