Glucose regulation and face recognition deficits in older adults: the role of attention

Jones, Nicola and Riby, Leigh M. and Smith, Michael A. (2017) Glucose regulation and face recognition deficits in older adults: the role of attention. Aging, Neuropsychology and Cognition, 25 (5). pp. 673-694. ISSN 1382-5585

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Abstract

The present study investigated the perceptual, attentional and memory processes underlying face recognition deficits observed in older adults with impaired glucoregulation. Participants were categorised as good glucoregulators or poor glucoregulators on the basis of an oral glucose tolerance test (OGTT). Using event-related potential (ERP) methodology, 23 participants (18 females, range = 62 to 88 years old, mean age = 73.87 years old, SD = 8.41) performed a 2-stimulus oddball task. Participants were asked to rate and memorise 10 ‘target’ faces, which were then presented amongst 120 unfamiliar foils. Behavioural results indicated that good glucoregulators were significantly more accurate at recognising target faces. ERP markers of early visual perception (the P1 and N170 components) and memory formation (the P3 component) were unaffected by glucoregulatory efficiency. The P2 component, an index of attentional processing, was larger and delayed in the poor glucoregulators. To the best of our knowledge, the present study is the first to suggest that face recognition deficits in poor glucoregulators may be due to impairments in attentional processing.

Item Type:	Article
Additional Information and Comments:	This is an accepted manuscript of an article published by by Taylor and Francis in Aging, Neuropsychology and Cognition. The final, published version is available from: http://www.tandfonline.com/doi/full/10.1080/13825585.2017.1365813
Keywords:	event-related potentials, glucoregulation, oddball paradigm, face recognition, ageing
Faculty / Department:	Faculty of Human and Digital Sciences > School of Psychology
Depositing User:	Nicola Jones
Date Deposited:	09 Aug 2017 09:21
Last Modified:	22 Nov 2022 16:10
URI:	https://hira.hope.ac.uk/id/eprint/2108

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