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Tracking Talking: Dual Task Costs of Planning and Producing Speech for Young versus Older Adults
Kemper, Susan Hoffman, Lesa Schmalzried, RaLynn Cheri Herman, Ruth E. Kieweg, Douglas
Kemper, Susan
Hoffman, Lesa
Schmalzried, RaLynn Cheri
Herman, Ruth E.
Kieweg, Douglas
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Abstract
A digital pursuit rotor was used to monitor speech planning and production costs by time-locking tracking performance to the auditory wave form produced as young and older adults were describing someone they admire. The speech sample and time-locked tracking record were segmented at utterance boundaries and multilevel modeling was used to determine how utterance-level predictors such as utterance duration or sentence grammatical complexity and person-level predictors such as speaker age or working memory capacity predicted tracking performance. Three models evaluated the costs of speech planning, the costs of speech production, and the costs of speech output monitoring. The results suggest that planning and producing propositionally dense utterances is more costly for older adults and that older adults experience increased costs as a result of having produced a long, informative, or rapid utterance.
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Date
2011-05
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Publisher
Taylor & Francis (Psychology Press)
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Keywords
Aging, Speech production, Speech planning, Dual task demands, Fluency
Citation
Kemper, S., Hoffman, L., Schmalzried, R., Herman, R., & Kieweg, D. (2011). Tracking Talking: Dual Task Costs of Planning and Producing Speech for Young versus Older Adults. Aging, Neuropsychology, and Cognition, 18, 257-279. PMC3091967 http://dx.doi.org/10.1080/13825585.2010.527317