Visual Perception

321.

Comparison of block and event-related fMRI designs in evaluating the word-frequency effect.

Printed word frequency can modulate retrieval effort in a task requiring associative semantic judgment. Event-related fMRI, while avoiding stimulus order predictability, is in theory statistically less powerful than block designs. We compared one ...
Michael W L Chee, Vinod Venkatraman, Christopher Westphal, Soon Chun Siong (Hum Brain Mapp, 200303)
comparison-block-event-related-fmri-designs-evaluating-word-frequency.asp

322.

Frequency and metrics of square-wave jerks: influences of task-demand characteristics.

PURPOSE: Square-wave jerks (SWJs) during visual fixation and pursuit tracking of targets of varying speed and predictability were investigated in the present study. METHODS: SWJs were measured in 91 subjects as they fixated a target or a remembered ...
Dennis M Shaffer, Christine M Krisky, John A Sweeney (Invest Ophthalmol Vis Sci, 200303)
frequency-metrics-square-wave-jerks-influences-task-demand.asp

323.

Directional anisotropies reveal a functional segregation of visual motion processing for perception and action.

Human exhibits an anisotropy in direction perception: discrimination is superior when motion is around horizontal or vertical rather than diagonal axes. In contrast to the consistent directional anisotropy in perception, we found only small idiosyncratic ...
Anne K Churchland, Justin L Gardner, I han Chou, Nicholas J Priebe, Stephen G Lisberger (Neuron, 200303)
directional-anisotropies-reveal-functional-segregation-visual-motion.asp

324.

Effects of visual information and task constraints on intersegmental coordination in playground swinging.

The authors investigated how and to what extent visual information and associated task constraints are negotiated in the coordinative structure of playground swinging. Participants (N = 20) were invited to pump a swing from rest to a prescribed maximal ...
A A Post, C E Peper, P J Beek (J Mot Behav, 200303)
effects-visual-information-task-constraints-intersegmental.asp

325.

Effects of label format on knowledge acquisition and perceived readability by younger and older adults.

This research examines consumers information acquisition and preference for labels of a simulated over-the-counter (OTC) medication. Twelve otherwise identical OTC drug bottles were compared with different back labels varying in (a) print size, (b) ...
Michael S Wogalter, William J Vigilante (Ergonomics, 200303)
effects-label-format-knowledge-acquisition-perceived-readability.asp

326.

A neural model for visual selection of grouped spatial arrays.

Psychophysical and electrophysiological studies indicate that visual attention operates on early retinotopic maps and selects spatially grouped arrays of locations which correspond to objects or perceptual groups. A neural model is proposed which is able ...
Drazen Domijan (Neuroreport, 200303)
neural-model-visual-selection-grouped-spatial-arrays.asp

327.

Distorted retrospective eyewitness reports as functions of feedback and delay.

Participant-witnesses viewed a crime video and attempted to identify the culprit from a culprit-absent lineup. The 253 mistaken-identification eyewitnesses were randomly given confirming, disconfirming, or no feedback regarding their identifications. ...
Gary L Wells, Elizabeth A Olson, Steve D Charman (J Exp Psychol Appl, 200303)
distorted-retrospective-eyewitness-reports-functions-feedback-delay.asp

328.

Pedestrian conspicuity research: a review.

This review sets out to evaluate the ways in which pedestrian conspicuity has been defined and measured and to consider the various scenarios in which studies of pedestrian conspicuity have been conducted. Research from the psychological and human ...
Martin P Langham, Nicholas J Moberly (Ergonomics, 200303)
pedestrian-conspicuity-research-review.asp

329.

Visual awareness of low-contrast stimuli is reflected in event-related brain potentials.

Visual awareness was studied in 11 subjects by using coherent and scrambled objects as stimuli. The stimuli were presented near the subjective perceptual threshold. Explicitly recognized stimuli elicited a specific negative ERP deflection peaking at 460 ...
Ville Ojanen, Antti Revonsuo, Mikko Sams (Psychophysiology, 200303)
visual-awareness-low-contrast-stimuli-reflected-event-related-brain.asp

330.

Age-related changes in selective attention and perceptual load during visual search.

Three visual search experiments were conducted to test the hypothesis that age differences in selective attention vary as a function of perceptual load (E. A. Maylor & N. Lavie, 1998). Under resource-limited conditions (Experiments 1 and 2), the ...
David J Madden, Linda K Langley (Psychol Aging, 200303)
age-related-changes-selective-attention-perceptual-load-visual-search.asp