A5067442523- Visual perception and processing mechanisms
- Neural dynamics and brain function
- Neural and Behavioral Psychology Studies
- Action Observation and Synchronization
- Autism Spectrum Disorder Research
- EEG and Brain-Computer Interfaces
- Behavioral and Psychological Studies
- stochastic dynamics and bifurcation
- Face Recognition and Perception
- Multisensory perception and integration
- Ocular and Laser Science Research
- Child and Animal Learning Development
- Tactile and Sensory Interactions
- Neurobiology and Insect Physiology Research
- Retinal Development and Disorders
- Advanced Materials and Mechanics
- Visual Attention and Saliency Detection
- Neuroscience and Neural Engineering
- Ophthalmology and Visual Impairment Studies
- Homotopy and Cohomology in Algebraic Topology
- Gaze Tracking and Assistive Technology
- Computational Geometry and Mesh Generation
- Human Pose and Action Recognition
- Color perception and design
- Functional Brain Connectivity Studies
University of Canberra
2018-2025
Monash University
2015-2024
ACT Government
2020
California Institute of Technology
2009-2017
University of California, Los Angeles
2011-2015
UCLA Health
2012-2013
Utrecht University
2005-2010
Collège de France
2003
Centre National de la Recherche Scientifique
2003
Recent research has slowly corroded a belief that selective attention and consciousness are so tightly entangled they cannot be individually examined. In this review, we summarize psychophysical neurophysiological evidence for dissociation between top-down consciousness. The includes recent findings show subjects can attend to perceptually invisible objects. More contentious is the finding become conscious of an isolated object, or gist scene in near absence attention; critically re-examine...
GENERAL COMMENTARY article Front. Psychol., 28 January 2013Sec. Perception Science Volume 4 - 2013 | https://doi.org/10.3389/fpsyg.2013.00019
The brain's ability to handle sensory information is influenced by both selective attention and consciousness. There no consensus on the exact relationship between these two processes whether they are distinct. So far, experiment has simultaneously manipulated both. We carried out a full factorial 2 × study of simultaneous influences consciousness (as assayed visibility) perception, correcting for possible concurrent changes in investigated duration afterimages all four combinations high...
The neural mechanisms underlying attentional selection of competing signals for awareness remains an unresolved issue. We studied selection, using perceptually ambiguous stimuli in a novel multisensory paradigm that combined auditory and visual stimuli. demonstrate the ability to select, attentively hold, one alternatives either sensory modality is greatly enhanced when there matching cross-modal stimulus. Intriguingly, this multimodal enhancement seems require conscious act attention, as...
Adaptation is one of the key constituents perceptual alternation process during binocular rivalry, as it has been shown that preadapting rivaling pairs before rivalry onset biases perception away from adapted stimulus rivalry. We investigated influence retinotopic and spatiotopic preadaptation on show for grating stimuli, only influences when adaptation locations are retinotopically matched. With more complex house face effects found both preadaptation, showing importance encoding in show,...
Abstract Biological motion research is an increasingly active field, with a great potential to contribute wide range of applications, such as behavioral monitoring/motion detection in surveillance situations, intention inference social interactions, and diagnostic tools autism research. In recent years, large amount capture data has become freely available online, potentially providing rich stimulus sets for biological However, there currently does not exist easy-to-use tool extract, present...
There is a growing understanding that both top-down and bottom-up signals underlie perception. But it not known how these integrate with each other this depends on the perceived stimuli’s predictability. ‘Predictive coding’ theories describe integration in terms of well predictions fit sensory input. Identifying neural markers for such signal therefore essential study perception predictive coding theories. To achieve this, we combined EEG methods preferentially tag different levels visual...
People with Autism Spectrum Disorder (ASD) are hypothesized to have poor high-level processing but superior low-level processing, causing impaired social recognition, and a focus on non-social stimulus contingencies. Biological motion perception provides an ideal domain investigate exactly how ASD modulates the interaction between low because it involves multiple stages, carries many important cues. We investigated individual differences among typically developing observers in biological...
Whether conscious perception requires attention remains a topic of intense debate. While certain complex stimuli such as faces and animals can be discriminated outside the focus spatial attention, many simpler cannot. Because evidence was obtained in dual-task paradigms involving no measure subjective insight, it unclear whether accurate discrimination unattended is product automatic, unconscious processing, blindsight, or accessible to consciousness. Furthermore, these typically require...
Given the ecological importance of biological motion and its relevance to social cognition, considerable effort has been devoted over past decade studying perception in autism. However, previous studies have asked observers detect or recognize briefly presented human actions placed isolation, without spatial temporal context. Research on typical populations shown influence context perception: prolonged exposure one action gives rise an aftereffect that biases a subsequently displayed action....
The elements most vivid in our conscious awareness are the ones to which we direct attention. Scientific study confirms impression of a close bond between selective attention and visual awareness, yet nature this association remains elusive. Using afterimages as an index, investigate neural processing stimuli they enter become object We find evidence response enhancement accompanying both phase-sensitive channels characteristic early stages phase-insensitive typical higher cortical areas....
Classifying an action as a runner or walker is seemingly effortless process. However, it difficult to determine which features are used with hypothesis-driven research, because biological motion stimuli generally consist of about dozen joints, yielding enormous number potential relationships among them. Here, we develop hypothesis-free approach based on classification image method, using experimental data from relatively few trials (∼1,000 per subject). Employing ambiguous actions morphed...
The attentional sampling hypothesis suggests that attention rhythmically enhances sensory processing when attending to a single (~8 Hz), or multiple (~4 Hz) objects. Here, we investigated whether samples representations are not part of the conscious percept during binocular rivalry. When crossmodally cued toward image, subsequent changes in consciousness occurred at ~8 Hz, consistent with rates undivided sampling. However, was suppressed slowed ~3.5 indicating division away from visual...
Humans are social animals, constantly engaged with other people. The importance of thought and action is hard to overstate. However, information so important that it actually determines which stimuli promoted conscious experience suppressed as invisible? To address this question, we used a binocular rivalry paradigm, in the two eyes receive different stimuli. In experiments measured percept rival actions found interactions granted preferential access visual awareness over non-interactive...
The effects of top-down attention on perception have been intensively studied using binary categorization tasks (e.g., seen vs. unseen). However, such poorly characterise the quality experience, or qualia, for short. To attentional we combined a dual-task paradigm with similarity rating to examine whether relational structures qualia are altered by amplification. Under same physical input, withdrawing collapsed letters (N=14) and red/green bisected disks (N=14), but not faces (N=13), as...
The effects of top-down attention on perception have been intensively studied using binary categorization tasks (e.g., seen vs. unseen). However, such poorly characterise the quality experience, or qualia, for short. To attentional we combined a dual-task paradigm with similarity rating to examine whether relational structures qualia are altered by amplification. Under same physical input, withdrawing collapsed letters (N=14) and red/green bisected disks (N=14), but not faces (N=13), as...