scholarly journals Category discrimination of early electrophysiological responses reveals the time course of natural scene perception

2017 ◽  
Vol 17 (10) ◽  
pp. 311
Author(s):  
Matthew Lowe ◽  
Jason Rajsic ◽  
Susanne Ferber ◽  
Dirk Walther
Keyword(s):  
Time Course ◽  
Scene Perception ◽  
Natural Scene ◽  
Electrophysiological Responses ◽  
Category Discrimination ◽  
Natural Scene Perception

scholarly journals Maxwellian Eye Fixation during Natural Scene Perception

2012 ◽  
Vol 2012 ◽  
pp. 1-12 ◽  
Author(s):  
Jean Duchesne ◽  
Vincent Bouvier ◽  
Julien Guillemé ◽  
Olivier A. Coubard
Keyword(s):  
Eye Movements ◽  
Eye Movement ◽  
Scene Perception ◽  
Random Motion ◽  
Natural Scenes ◽  
Movement Amplitude ◽  
Natural Scene ◽  
Eye Fixation ◽  
Free Viewing ◽  
Natural Scene Perception

When we explore a visual scene, our eyes make saccades to jump rapidly from one area to another and fixate regions of interest to extract useful information. While the role of fixation eye movements in vision has been widely studied, their random nature has been a hitherto neglected issue. Here we conducted two experiments to examine the Maxwellian nature of eye movements during fixation. In Experiment 1, eight participants were asked to perform free viewing of natural scenes displayed on a computer screen while their eye movements were recorded. For each participant, the probability density function (PDF) of eye movement amplitude during fixation obeyed the law established by Maxwell for describing molecule velocity in gas. Only the mean amplitude of eye movements varied with expertise, which was lower in experts than novice participants. In Experiment 2, two participants underwent fixed time, free viewing of natural scenes and of their scrambled version while their eye movements were recorded. Again, the PDF of eye movement amplitude during fixation obeyed Maxwell’s law for each participant and for each scene condition (normal or scrambled). The results suggest that eye fixation during natural scene perception describes a random motion regardless of top-down or of bottom-up processes.

Learning and surface boundary feedbacks for colour natural scene perception

2017 ◽  
Vol 61 ◽  
pp. 30-41 ◽  
Author(s):  
Francisco J. Díaz-Pernas ◽  
Mario Martínez-Zarzuela ◽  
Míriam Antón-Rodríguez ◽  
David González-Ortega
Keyword(s):  
Scene Perception ◽  
Surface Boundary ◽  
Natural Scene ◽  
Natural Scene Perception

scholarly journals Natural-Scene Perception Requires Attention

2011 ◽  
Vol 22 (9) ◽  
pp. 1165-1172 ◽  
Author(s):  
Michael A. Cohen ◽  
George A. Alvarez ◽  
Ken Nakayama
Keyword(s):  
Scene Perception ◽  
Natural Scene ◽  
Natural Scene Perception

Left–right asymmetries in natural scene perception

2008 ◽  
Vol 67 ◽  
pp. 17-18
Author(s):  
Olivier A. Coubard ◽  
Céline Perez ◽  
Seta Kazandjian ◽  
Sylvie Chokron
Keyword(s):  
Scene Perception ◽  
Natural Scene ◽  
Natural Scene Perception

Asynchronies in the Development of Electrophysiological Responses to Motion and Color

2004 ◽  
Vol 16 (8) ◽  
pp. 1363-1374 ◽  
Author(s):  
Teresa V. Mitchell ◽  
Helen J. Neville
Keyword(s):  
Time Course ◽  
Behavioral Plasticity ◽  
Dorsal Stream ◽  
Event Related Potentials ◽  
Developmental Time ◽  
Ventral Stream ◽  
Visual Stream ◽  
Age Related ◽  
Electrophysiological Responses ◽  
Related Potentials

Recent reports have documented greater plasticity in the dorsal visual stream as compared with the ventral visual stream. This study sought to test the hypothesis that this greater plasticity may be related to a more protracted period of development in the dorsal as compared with the ventral stream. Age-related effects on event-related potentials (ERPs) elicited by motion and color stimuli, designed to activate the two visual streams, were assessed in healthy individuals aged 6 years through adulthood. Although significant developmental effects were observed in amplitudes of ERPs to both color and motion stimuli, marked latency effects were observed only in response to motion. These results provide support for the hypothesis that the dorsal stream displays a longer developmental time course across the early school years than the ventral stream. Implications for neural and behavioral plasticity are discussed.

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