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Brain Res. 2016 Jun 1;1640(Pt B):183-92. doi: 10.1016/j.brainres.2016.01.044. Epub 2016 Feb 2.

Resource allocation models of auditory working memory.

Author information

1
Institute of Cognitive Neuroscience, University College London, UK; Institute of Neurology, University College London, UK. Electronic address: sabine.joseph@ucl.ac.uk.
2
Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford OX1 3QX, UK.
3
Wellcome Trust Centre for Neuroimaging, University College London, London, UK; Institute of Neuroscience, Medical School, Newcastle University, Newcastle, UK.
4
Department of Clinical Neuroscience, University of Oxford, UK; Department of Experimental Psychology, University of Oxford, UK.
5
Wellcome Trust Centre for Neuroimaging, University College London, London, UK; Institute of Neuroscience, Medical School, Newcastle University, Newcastle, UK. Electronic address: tim.griffiths@ncl.ac.uk.

Abstract

Auditory working memory (WM) is the cognitive faculty that allows us to actively hold and manipulate sounds in mind over short periods of time. We develop here a particular perspective on WM for non-verbal, auditory objects as well as for time based on the consideration of possible parallels to visual WM. In vision, there has been a vigorous debate on whether WM capacity is limited to a fixed number of items or whether it represents a limited resource that can be allocated flexibly across items. Resource allocation models predict that the precision with which an item is represented decreases as a function of total number of items maintained in WM because a limited resource is shared among stored objects. We consider here auditory work on sequentially presented objects of different pitch as well as time intervals from the perspective of dynamic resource allocation. We consider whether the working memory resource might be determined by perceptual features such as pitch or timbre, or bound objects comprising multiple features, and we speculate on brain substrates for these behavioural models. This article is part of a Special Issue entitled SI: Auditory working memory.

KEYWORDS:

Auditory objects; Auditory working memory; Memory representations; Non-verbal sounds; Resource models

PMID:
26835560
DOI:
10.1016/j.brainres.2016.01.044
[Indexed for MEDLINE]

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