Browsing School of Psychology (Scholarly Articles) by Subject "Psychophysics"
Now showing items 1-13 of 13
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Can we explain cross-modal representation with neural algorithms alone?: Commentary on Paillard
(North-Holland, 1999)Recent research in both psychophysics and electrophysiology has revealed a number of examples in which behaviour is guided by (i.e. Spence & Driver, 1996), and brain activity has been argued to correlate with, the formation ... -
Closure of salient regions determines search for a collinear target configuration
(Psychonomic Society, 2007-01)Grouping operations offer an effective mechanism by which to structure complex visual scenes. Among the various principles that support element integration, closure may be regarded as a main factor in shape extraction. In ... -
The computation of shape orientation in search for Kanizsa figures
(Pion Ltd, 2009-01-29)Previous studies of visual search for illusory figures have provided equivocal results, with efficient search for Kanizsa squares (eg Davis and Driver, 1994 Nature 371 291-293) contrasting with inefficient search for Kanizsa ... -
Effects of stimulus synchrony on mechanisms of perceptual organization
(Taylor & Francis, 2001-06-05)When neurons adopt a synchronized, oscillatory response to stimulus Gestalten, the phase of those oscillations almost always varies relative to stimulus activity. This has been taken to indicate that form-coding mechanisms ... -
The effects of subthreshold synchrony on the perception of simultaneity.
(Springer, 2007)We aimed to examine the effects of subthreshold synchrony and asynchrony on the perception of simultaneity. We rendered simultaneous or asynchronous luminance changes below detection thresholds by embedding them in a ... -
Evidence for 40-Hz oscillatory short-term visual memory revealed by human reaction-time measurements
(American Psychological Association, 2000-05)Four experiments show that presentation of a synchronous premask frame within a 40-Hz, flickering premask matrix primes subsequent detection of a Kanizsa-type square by generation of a 40-Hz prime. Reaction time (RT) priming ... -
Evidence for impaired visuo-perceptual organization in developmental dyslexics and its relation to temporal processes.
(Taylor & Francis, 2005-07)An analysis of normal and dyslexic readers' reaction-time (RT) performance in a standard visualdetection task (Experiment A) and in temporally primed visual detection (Experiment B) reveals a tendency for significantly ... -
Extended visual simultaneity thresholds in patients with schizophrenia
(Oxford University Press, 2009-07)Clinical observations suggest that the experience of time phenomenology is disturbed in schizophrenia, possibly originating disorders in dynamic cognitive functions such as language or motor planning. We examined the ... -
A moment to reflect upon perceptual synchrony
(MIT Press, 2006-10)How does neuronal activity bring about the interpretation of visual space in terms of objects or complex perceptual events? If they group, simple visual features can bring about the integration of spikes from neurons ... -
Prefrontal cortex and the generation of oscillatory visual persistence
(Cambridge University Press, 2003-12-01)In this commentary, the formation of "pre-iconic" visual-prime persistence is described in the context of prime-specific, independent-component activation at prefrontal and posterior EEG-recording sites. Although this ... -
Prefrontal cortex and the generation of oscillatory visual persistence
(Cambridge University Press, 2003)In this commentary, the formation of ¿pre-iconic¿ visual-prime persistence is described in the context of prime-specific, independent-component activation at prefrontal and posterior EEG-recording sites. Although this ... -
Synchronization and stimulus timing: Implications for temporal models of visual information processing.
(Lawrence Erlbaum and Associates / Psychology Press (Taylor & Francis), 2004)In the visual system, objects and object groupings may be initially coded in terms of physically separable attributes or features, representing differential spatial frequencies, orientations, colors, directions of motion, ... -
Synchronous information presented in 40-Hz flicker enhances visual feature binding
(Blackwell, 1998-01)Recent neurophysiological studies have encouraged speculation that the synchronization of spatially distributed neural assemblies (at around 40 Hz in the neocortex) is responsible for the binding of discrete stimulus ...