Visual Perception

451.

Central control of heart rate changes during visual affective processing as revealed by fMRI.

In the present study we addressed the question of central control of heart rate (HR) in emotions. Parallel measurement of HR changes and changes of local intensity of blood flow as indexed by fMRI in a procedure eliciting emotions allowed us to pinpoint ...
Michal Kuniecki, Andrzej Urbanik, Barbara Sobiecka, Justyna Kozub, Marek Binder (Acta Neurobiol Exp (Wars), 2003)
central-control-heart-rate-changes-visual-affective-processing.asp

452.

Comparison at a distance.

The visual system is known to contain hard-wired mechanisms that compare the values of a given stimulus attribute at adjacent positions in the visual field; but how are comparisons performed when the stimuli are not adjacent? We ask empirically how well ...
Marina V Danilova, John D Mollon (Perception, 2003)
comparison-distance.asp

453.

Brain activation evoked by perception of gaze shifts: the influence of context.

Prior studies from our laboratory [Journal of Neuroscience 18 (1998) 2188; Cognitive Neuropsychology 17 (2000) 221] have demonstrated that discrete regions of the superior temporal sulcus (STS) are activated when a subject views a face in which the eyes ...
Kevin A Pelphrey, Jeffrey D Singerman, Truett Allison, Gregory McCarthy (Neuropsychologia, 2003)
brain-activation-evoked-perception-gaze-shifts-influence-context.asp

454.

Hearing foreign voices: does knowing what is said affect visual-masked-speech detection?

We investigated audio-visual (AV) perceptual integration by examining the effect of seeing the speakers synchronised moving face on masked-speech detection ability. Signal amplification and higher-level cognitive accounts of an AV advantage were ...
Jeesun Kim, Chris Davis (Perception, 2003)
hearing-foreign-voices-knowing-said-affect-visual-masked-speech.asp

455.

Visuomotor priming by pictures of hand postures: perspective matters.

Observing hand postures interacts with the preparation of similar actions. This may be due to motor encoding of the observed displays and/or to enhanced visual processing induced by motor planning. We studied the effects of the observers perspective on ...
Stefan Vogt, Paul Taylor, Brian Hopkins (Neuropsychologia, 2003)
visuomotor-priming-pictures-hand-postures-perspective-matters.asp

456.

Temporal dynamics of early light adaptation.

This study investigated two aspects of visual sensitivity to a change in light level. The first experiment examined the time course of sensitivity to a small amplitude 1-s contrast pedestal presented on a 163-td pedestal within a 115-td surround. The ...
Joel Pokorny, Vincent C W Sun, Vivianne C Smith (J Vis, 2003)
temporal-dynamics-early-light-adaptation.asp

457.

Being the target of anothers emotion: a PET study.

The eye region and gaze behaviour are known to play a major role in conveying information about direction of attention and emotional dispositions. Positron emission tomography scanning was used to explore the cerebral structures involved while subjects ...
Bruno Wicker, David I Perrett, Simon Baron-Cohen, Jean Decety (Neuropsychologia, 2003)
target-s-emotion-pet-study.asp

458.

Correlation between stereoanomaly and perceived depth when disparity and motion interact in binocular matching.

The aim of this study was to find out to what extent binocular matching is facilitated by motion when stereoanomalous and normal subjects estimate the perceived depth of a 3-D stimulus containing excessive matching candidates. Thirty subjects viewed ...
Raymond van Ee (Perception, 2003)
correlation-stereoanomaly-perceived-depth-disparity-motion-interact.asp

459.

Perceptual illusion and the real-time control of action.

Participants were cued by an auditory tone to grasp a target object from within a size-contrast display. The peak grip aperture was unaffected by the perceptual size illusion when the target array was visible between the response cue and movement onset ...
David A Westwood, Melvyn A Goodale (Spat Vis, 2003)
perceptual-illusion-real-time-control-action.asp

460.

Endogenous shifts of covert attention operate within multiple coordinate frames: evidence from a feature-priming task.

The locations of visual objects and events in the world are represented in a number of different coordinate frameworks. For example, a visual transient is known to attract (exogenous) attention and facilitate performance within an egocentric framework. ...
Doug J K Barrett, Mark F Bradshaw, David Rose (Perception, 2003)
endogenous-shifts-covert-attention-operate-multiple-coordinate-frames.asp