Competitive interactions affect working memory performance for both simultaneous and sequential stimulus presentation

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@article{b10abfb6db9549cb9792c4d2af5af1db,
title = "Competitive interactions affect working memory performance for both simultaneous and sequential stimulus presentation",
abstract = "Competition between simultaneously presented visual stimuli lengthens reaction time and reduces both the BOLD response and neural firing. In contrast, conditions of sequential presentation have been assumed to be free from competition. Here we manipulated the spatial proximity of stimuli (Near versus Far conditions) to examine the effects of simultaneous and sequential competition on different measures of working memory (WM) for colour. With simultaneous presentation, WM precision was significantly lower for Near items, and participants reported the colour of the wrong item more often. These effects were preserved when the second stimulus immediately followed the first, disappeared when they were separated by 500ms, and were partly recovered (evident for our measure of mis-binding but not WM precision) when the task was altered to encourage participants to maintain the sequentially presented items together in WM. Our results show, for the first time, that competition affects WM precision, and challenge the assumption that sequential presentation removes competition.",
keywords = "attention, human behaviour, perception",
author = "Jumana Ahmad and Garrett Swan and Howard Bowman and Brad Wyble and Anna Nobre and Kimron Shapiro and Fiona McNab",
year = "2017",
month = "7",
day = "6",
doi = "10.1038/s41598-017-05011-x",
language = "English",
volume = "7",
journal = "Scientific Reports",
issn = "2045-2322",
publisher = "Nature Publishing Group",

}

RIS

TY - JOUR

T1 - Competitive interactions affect working memory performance for both simultaneous and sequential stimulus presentation

AU - Ahmad, Jumana

AU - Swan, Garrett

AU - Bowman, Howard

AU - Wyble, Brad

AU - Nobre, Anna

AU - Shapiro, Kimron

AU - McNab, Fiona

PY - 2017/7/6

Y1 - 2017/7/6

N2 - Competition between simultaneously presented visual stimuli lengthens reaction time and reduces both the BOLD response and neural firing. In contrast, conditions of sequential presentation have been assumed to be free from competition. Here we manipulated the spatial proximity of stimuli (Near versus Far conditions) to examine the effects of simultaneous and sequential competition on different measures of working memory (WM) for colour. With simultaneous presentation, WM precision was significantly lower for Near items, and participants reported the colour of the wrong item more often. These effects were preserved when the second stimulus immediately followed the first, disappeared when they were separated by 500ms, and were partly recovered (evident for our measure of mis-binding but not WM precision) when the task was altered to encourage participants to maintain the sequentially presented items together in WM. Our results show, for the first time, that competition affects WM precision, and challenge the assumption that sequential presentation removes competition.

AB - Competition between simultaneously presented visual stimuli lengthens reaction time and reduces both the BOLD response and neural firing. In contrast, conditions of sequential presentation have been assumed to be free from competition. Here we manipulated the spatial proximity of stimuli (Near versus Far conditions) to examine the effects of simultaneous and sequential competition on different measures of working memory (WM) for colour. With simultaneous presentation, WM precision was significantly lower for Near items, and participants reported the colour of the wrong item more often. These effects were preserved when the second stimulus immediately followed the first, disappeared when they were separated by 500ms, and were partly recovered (evident for our measure of mis-binding but not WM precision) when the task was altered to encourage participants to maintain the sequentially presented items together in WM. Our results show, for the first time, that competition affects WM precision, and challenge the assumption that sequential presentation removes competition.

KW - attention

KW - human behaviour

KW - perception

U2 - 10.1038/s41598-017-05011-x

DO - 10.1038/s41598-017-05011-x

M3 - Article

VL - 7

JO - Scientific Reports

JF - Scientific Reports

SN - 2045-2322

M1 - 4785

ER -