Visual Perception

271.

Forcing function effects on nonlinear trajectories: identifying very local brain dynamics.

Effects of imposing a sinusoidal acoustic and visual forcing function at various frequencies onto an EEG process are examined in terms of various indices of the nonlinear dynamics. Conjoint use of four methods of data analysis; Lyapunov exponents, the ...
Robert A M Gregson, Kerry Leahan (Nonlinear Dynamics Psychol Life Sci, 200304)
forcing-function-effects-nonlinear-trajectories-identifying-local.asp

272.

The role of depth and 1/f dynamics in perceiving reversible figures.

When confronted with a reversible figure, such as the Necker Cube, viewers experience a spontaneously changing percept. We assess the dynamic of how the human visual system resolves perceptual ambiguity in stimuli that offer multiple interpretations. ...
Deborah J Aks, Julien C Sprott (Nonlinear Dynamics Psychol Life Sci, 200304)
role-depth-f-dynamics-perceiving-reversible-figures.asp

273.

A test of the optimal classifiers independence assumption in perceptual categorization.

Observers completed perceptual categorization tasks that included separate base-rate/payoff manipulations, corresponding simultaneous base-rate/payoff manipulations, and conflicting simultaneous base-rate/payoff manipulations. Performance (1) was closer ...
Corey J Bohil, W Todd Maddox (Percept Psychophys, 200304)
test-optimal-classifier-s-independence-assumption-perceptual.asp

274.

Individual stopping times and cognitive control: converging evidence for the stop signal task from a continuous tracking paradigm.

The present study introduces a continuous tracking procedure to investigate cognitive stopping in individual trials. Our measure of stopping performance had a mean similar to mean stopping times estimated in the stop signal paradigm, suggesting a common ...
Sharon Morein-Zamir, Nachshon Meiran (Q J Exp Psychol A, 200304)
individual-stopping-times-cognitive-control-converging-evidence-stop.asp

275.

Lexical and sublexical components of age-related changes in neural activation during visual word identification.

Positron emission tomography data (Madden, Langley, et al., 2002) were analyzed to investigate adult age differences in the relation between neural activation and the lexical (word frequency) and sublexical (word length) components of visual word ...
Wythe L Whiting, David J Madden, Linda K Langley, Laura L Denny, Timothy G Turkington, James M Provenzale, Thomas C Hawk, R Edward Coleman (J Cogn Neurosci, 200304)
lexical-sublexical-components-age-related-changes-neural-activation.asp

276.

Descriptions and identifications of strangers by youth and adult eyewitnesses.

Two studies varying target gender and mode of target exposure were conducted to compare the quantity, nature, and accuracy of free recall person descriptions provided by youths and adults. In addition, the relation among age, identification accuracy, and ...
Joanna D Pozzulo, Kelly L Warren (J Appl Psychol, 200304)
descriptions-identifications-strangers-youth-adult-eyewitnesses.asp

277.

Bayesian models of object perception.

The human visual system is the most complex pattern recognition device known. In ways that are yet to be fully understood, the visual cortex arrives at a simple and unambiguous interpretation of data from the retinal image that is useful for the ...
Daniel Kersten, Alan Yuille (Curr Opin Neurobiol, 200304)
bayesian-models-object-perception.asp

278.

The neural basis of object perception.

Humans can recognize an object within a fraction of a second, even if there are no clues about what kind of object it might be. Recent findings have identified functional properties of extrastriate regions in the ventral visual pathway that are involved ...
Kalanit Grill-Spector (Curr Opin Neurobiol, 200304)
neural-basis-object-perception.asp

279.

Neural correlates of decision processes: neural and mental chronometry.

Recent studies aim to explain the duration and variability of behavioral reaction time in terms of neural processes. The time taken to make choices is occupied by at least two processes. Neurons in sensorimotor structures accumulate evidence that leads ...
Jeffrey D Schall (Curr Opin Neurobiol, 200304)
neural-correlates-decision-processes-neural-mental-chronometry.asp

280.

Cortical mechanisms of space-based and object-based attentional control.

Visual attention, the mechanism by which observers select relevant or important information from scenes, can be deployed to locations in space or to spatially invariant object representations. Studies have examined both the modulatory effects of ...
Steven Yantis, John T Serences (Curr Opin Neurobiol, 200304)
cortical-mechanisms-space-based-object-based-attentional-control.asp