This study investigates the use of speech as an indicator of the onset of cognitive decline in the elderly. The analysis found features that correlate with the results of a clinical measure of cognitive function. Using a combination of temporal language features, such as pause and utterance duration, 76% classification accuracy was achieved. While no significant results were found for ASR experiments, vowel duration, on average, increased by 17% for subjects with cognitive impairment compared to those without. The results from this study introduce the concept of longitudinal studies into aging using speech as a window into cognitive function.
Bibliographic reference. D'Arcy, Shona / Rapcan, Viliam / Penard, Nils / Morris, Margaret E. / Robertson, Ian H. / Reilly, Richard B. (2008): "Speech as a means of monitoring cognitive function of elderly speakers", In INTERSPEECH-2008, 2230-2233.