Visual Perception

41.

Recognition by top-down and bottom-up processing in cortex: the control of selective attention.

Visual recognition is achieved by a hierarchy of bidirectionally connected cortical areas. The entry of signals into higher areas involves the serial sampling of information within a movable window of attention. Here we explore how the cortex can move ...
Dan Graboi, John Lisman (J Neurophysiol, 200308)
recognition-top-down-bottom-up-processing-cortex-control-selective.asp

42.

Cognitive control mechanisms revealed by ERP and fMRI: evidence from repeated task-switching.

We investigated the extent to which a common neural mechanism is involved in task set-switching and response withholding, factors that are frequently confounded in task-switching and go/no-go paradigms. Subjects brain activity was measured using ...
R Swainson, R Cunnington, G M Jackson, C Rorden, A M Peters, P G Morris, S R Jackson (J Cogn Neurosci, 200308)
cognitive-control-mechanisms-revealed-erp-fmri-evidence-repeated-task.asp

43.

Retrieval orientation and the control of recollection.

Event-related potentials (ERPs) were employed to investigate whether recognition test items are processed differently according to whether they are used to probe memory for previously studied words or pictures. In each of two study-test blocks, subjects ...
Jane E Herron, Michael D Rugg (J Cogn Neurosci, 200308)
retrieval-orientation-control-recollection.asp

44.

Latency differences and the flash-lag effect.

The tendency for briefly flashed stimuli to appear to lag behind the spatial position of physically aligned moving stimuli is known as the flash-lag effect. Possibly the simplest explanation for this phenomenon is that transient stimuli are processed ...
Derek H Arnold, Szonya Durant, Alan Johnston (Vision Res, 200308)
latency-differences-flash-lag-effect.asp

45.

Human kinematics and event control: on-line movement registration as a means for experimental manipulation.

In human movement and sports science, manipulations of perception and action are common and often comprise the control of events, such as opening or closing liquid crystal goggles. Most of these events are externally controlled, independent of the ...
Raôul R D Oudejans, Bert H Coolen (J Sports Sci, 200307)
human-kinematics-event-control-line-movement-registration-means.asp

46.

Objects, raised lines, and the haptic horizontal-vertical illusion.

Experiments were conducted to determine whether the haptic horizontal-vertical illusion occurs with solid, three-dimensional objects as well as with tangible lines. The objects consisted of round or square bases, with dowel rods projecting above them at ...
Morton A Heller, Deneen D Bracket, Shana S Salik, Eric Scroggs, Shavonda Green (Q J Exp Psychol A, 200307)
objects-raised-lines-haptic-horizontal-vertical-illusion.asp

47.

Identification of cerebral networks by classification of the shape of BOLD responses.

Changes in regional blood oxygen level dependent (BOLD) signals in response to brief visual stimuli can exhibit a variety of time-courses. To demonstrate the anatomical distribution of BOLD response shapes during a match to sample task, a formal analysis ...
Giovanni dAvossa, Gordon L Shulman, Maurizio Corbetta (J Neurophysiol, 200307)
identification-cerebral-networks-classification-shape-bold-responses.asp

48.

Gaze-centered updating of visual space in human parietal cortex.

Single-unit recordings have identified a region in the posterior parietal cortex (PPC) of the monkey that represents and updates visual space in a gaze-centered frame. Here, using event-related functional magnetic resonance imaging, we identified an ...
W Pieter Medendorp, Herbert C Goltz, Tutis Vilis, J Douglas Crawford (J Neurosci, 200307)
gaze-centered-updating-visual-space-human-parietal-cortex.asp

49.

What makes viewpoint-invariant properties perceptually salient?

It has been noted that many of the perceptually salient image properties identified by the Gestalt psychologists, such as collinearity, parallelism, and good continuation, age invariant to changes in viewpoint. However, I show that viewpoint invariance ...
David W Jacobs (J Opt Soc Am A Opt Image Sci Vis, 200307)
makes-viewpoint-invariant-properties-perceptually-salient.asp

50.

The aftereffects of ventriloquism: are they sound-frequency specific?

Exposing different sense modalities (like sight, hearing or touch) to repeated simultaneous but spatially discordant stimulations generally causes recalibration of localization processes in one or both of the involved modalities, which is manifested ...
Ilja Frissen, Jean Vroomen, Béatrice de Gelder, Paul Bertelson (Acta Psychol (Amst), 200307)
aftereffects-ventriloquism-sound-frequency-specific.asp