Accentuation-suppression and scaling: arousal modulation of attentional processing

Thomas Alrik Sørensen, Claus Bundesen

Publikation: Bidrag til tidsskriftKonferenceabstrakt i tidsskriftForskningpeer review

Abstrakt

The limitations of the visual short-term memory (VSTM) system have become an increasingly popular field of study. One line of inquiry has focused on the way attention selects objects for encoding into VSTM. Using the framework of the Theory of Visual Attention (TVA; Bundesen, 1990 Psychological Review 97 523–547) different components of attention were measured while arousal was systematically varied by manipulating temporal expectancies of the observer. The results showed increments in both overall speed of encoding into VSTM and efficiency of visual selection as the level of arousal was increased, whereas VSTM capacity showed some decrease with increasing arousal. Furthermore, attentional weights seemed to be modulated such that, as arousal increased, the attentional focus narrowed around fewer, highly relevant objects. Arousal seems to interact with attention in two different ways: Through a scaling mechanism modulating the decision bias of the observer and also through an accentuation-suppression mechanism that modulates the degree of subjective relevance of objects, contracting attention around fewer, highly relevant objects while suppressing less relevant objects. These mechanisms may afford an evolutionary advantage for an observer, ensuring that the most relevant objects are selected and encoded faster under high arousal, and making later processing more focused as the capacity of VSTM is decreased.
OriginalsprogEngelsk
TidsskriftPerception
Vol/bind41
Udgave nummerSuppl.
Sider (fra-til)40
Antal sider1
ISSN0301-0066
StatusUdgivet - 2012
BegivenhedEuropean Conference on Visual Perception - Conference Centre of the Carlos V Hotel, Lungomare Valencia, 24, Alghero, Italien
Varighed: 2 sep. 20126 sep. 2012
Konferencens nummer: 35

Konference

KonferenceEuropean Conference on Visual Perception
Nummer35
LokationConference Centre of the Carlos V Hotel, Lungomare Valencia, 24
LandItalien
ByAlghero
Periode02/09/201206/09/2012

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