Measurement-related issues in the investigation of active vision

Publikation: Beitrag in Buch/Konferenzbericht/Sammelband/GutachtenBeitrag in Buch/Sammelband/GutachtenBeigetragenBegutachtung

Beitragende

Abstract

In humans, as in all higher primates, vision is the dominant sensory modality. The essential role of eye movements in visual perception has been well known for a long time and has been repeatedly demonstrated (e.g., Findlay, 1998; Hayhoe & Ballard, 2005). This natural sampling of information from the environment requires that visual perception is investigated within the framework of “active vision” (Findlay, 1998). Due to the uneven distribution of light-sensitive receptors across the retina, the highest visual acuity is limited to the small foveal area (about two degrees of arc or double the thumbnail size of an extended arm). With increasing eccentricity-in parafoveal and peripheral regions-vision becomes blurred and the perception of color is reduced. These constraints make eye movements mandatory for perceiving the environment. Therefore, saccades-fast ballistic movements-are executed to bring the gaze from one point to another. The relatively stable periods in between are called •xations. The intake of visual information occurs within •xations but is largely suppressed during saccades. In many everyday situations, such as reading a text or inspecting an image, oculomotor activity can be described as interplay between •xations and saccades.

Details

OriginalspracheEnglisch
TitelMeasurement With Persons
Redakteure/-innenBirgitta Berglund, Giovanni B. Rossi, James T. Townsend, Leslie R. Pendrill
ErscheinungsortNew York
Herausgeber (Verlag)Taylor & Francis
Seiten281-300
Seitenumfang20
AuflageNeuerscheinung
ISBN (elektronisch)978-1-136-72374-2, 978-0-203-81666-0
ISBN (Print)978-1-84872-939-1
PublikationsstatusVeröffentlicht - 2012
Peer-Review-StatusJa

Publikationsreihe

ReiheScientific Psychology Series

Externe IDs

ORCID /0000-0002-6673-9591/work/142242335
WOS 000337512700014

Schlagworte

Schlagwörter

  • Fixation-related potentials, Top-down control, Eye-movements, Visual-perception, Large populations, Attention, Saccades, Complex, Search, Gaze