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Low Speech Connectedness in Alzheimer's Disease is Associated with Poorer Semantic Memory Performance
Bárbara Luzia Covatti Malcorra1, Natália Bezerra Mota2, Janaina Weissheimer3
1School of Humanities, Graduate Course in Linguistics, Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, RS, Brazil.
Abstract:
Connected speech is an everyday activity. We aimed to investigate whether connected speech can differentiate oral narrative production between adults with Alzheimer's disease (AD; n = 24) and cognitively healthy older adults (n = 48). We used graph attributes analysis to represent connected speech. Participants produced oral narratives and performed semantic, episodic, and working memory tasks. AD patients produced less connected narratives than cognitively healthy older adults. Connectedness was associated with semantic memory in AD and with episodic memory in controls. Word-graphs connectedness represents a practical tool to assess cognitive impairment in AD patients.
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