A5075156587- Visual perception and processing mechanisms
- Autism Spectrum Disorder Research
- Face Recognition and Perception
- Behavioral and Psychological Studies
- Cognitive and developmental aspects of mathematical skills
- Functional Brain Connectivity Studies
- Face recognition and analysis
- Tactile and Sensory Interactions
- Ophthalmology and Visual Impairment Studies
- Advanced Vision and Imaging
- Neural and Behavioral Psychology Studies
- Attention Deficit Hyperactivity Disorder
- Multisensory perception and integration
- Reading and Literacy Development
- Infant Health and Development
- Healthcare innovation and challenges
- Cognitive Abilities and Testing
- Ophthalmology and Eye Disorders
- Children's Physical and Motor Development
- Cerebral Palsy and Movement Disorders
- Psychology of Moral and Emotional Judgment
- Veterinary Practice and Education Studies
- Child and Animal Learning Development
- Human-Animal Interaction Studies
- Gaze Tracking and Assistive Technology
The University of Texas Southwestern Medical Center
2024
Brunel University of London
2005-2022
Wellcome Centre for Human Neuroimaging
2005-2009
University of Wollongong
2005-2006
University College London
1998-2001
We report that motion coherence thresholds in children with autism are significantly higher than matched controls. No corresponding difference form was found. interpret this as a specific deficit dorsal stream function autism. To examine the possibility of neural basis for perceptual and motor related abnormalities frequently cited we tested 23 diagnosed autistic disorder, on two tasks to ventral cortical functions. The results provide evidence individuals have impairment functioning....
Detection of coherent motion versus noise is widely used as a measure global visual-motion processing. To localise the human brain mechanisms involved in this performance, functional magnetic resonance imaging (fMRI) was to compare activation during viewing coherently moving random dots with that spatially and temporally comparable dynamic noise. Rates reversal coherent-motion velocities (5 20 deg s −1 ) were also compared. Differences local between conditions analysed by statistical...
People with autism have a number of reported deficits in object recognition and global processing. Is there low-level spatial integration deficit associated this? We measured spatial-form-coherence detection thresholds using Glass stimulus field random dots, compared performance to similar motion-coherence task. A coherent visual patch was depicted by dots separated rotational transformation space (form) or - time (motion). To measure parallel integration, stimuli were presented for only 250...
Eskine, Kacinik, and Prinz’s (2011) influential experiment demonstrated that gustatory disgust triggers a heightened sense of moral wrongness. We report large-scale multisite direct replication this study conducted by labs in the Collaborative Replications Education Project. Subjects each sample were randomly assigned to one three beverage conditions: bitter (disgusting), control (neutral), or sweet. Then, subjects made series judgments about wrongness behavior depicted six vignettes. In...
Facial motion is a special type of biological that transmits cues for socio-emotional communication and enables the discrimination properties such as gender identity. We used animated average faces to examine ability adults with autism spectrum disorders (ASD) perceive facial motion. Participants completed increasingly difficult tasks involving (1) sequences motion, (2) identity individuals based on their (3) individuals. Stimuli were presented in both upright upside-down orientations test...
Form and motion coherence was tested in children with dyspraxia matched controls to assess their global spatial processing abilities. Thresholds for detecting form patterns were significantly higher the dyspraxic group than control group. No corresponding difference found on task. We eight disorder (mean age 8.2 years) 50 verbal-mental-age 8.4 test a neural basis perceptual abnormalities observed dyspraxia. The results provide evidence that have specific impairment of information. This...
In this article, we examine the extent to which children with autism and learning difficulties can be discriminated from their responses different patterns of sensory stimuli. Using an adapted version Short Sensory Profile (SSP), processing was compared in 34 33 typical development 22 without autism. Both clinical groups showed high symptoms impairment controls. However, group displayed higher levels auditory hyper‐sensitivity visual stimulus‐seeking factors controls learning‐disabled group....
Advances in marker-less motion capture technology now allow the accurate replication of facial and deformation computer-generated imagery (CGI). A forced-choice discrimination paradigm using such CGI animations showed that human observers can categorize identity solely from cues. Animations were generated captures acquired during natural speech, thus eliciting both rigid (head rotations translations) nonrigid (expressional changes) motion. To limit interferences individual differences form,...
We report two experiments in which we used animated averaged faces to examine infants' ability perceive and discriminate facial motion. The were generated by using the motion recorded from of volunteers while they spoke. tested infants aged 4-8 months assess their sequences (condition 1) individuals 2). Infants habituated one sequence with actor speaking phrase. Following habituation, presented same together a different 1), or new coupled demonstrated significant preference for novel both...
While biological motion refers to both face and body movements, little is known about the visual perception of facial motion. We therefore examined alpha wave suppression as a reduction in power thought reflect activity, addition attentional reorienting memory processes. Nineteen neurologically healthy adults were tested on their ability discriminate between successive captures. These animations exhibited rigid non-rigid motion, well speech expressions. The structural surface appearance...
Many veterans returning to civilian life face medical and mental health issues. As there is a stigma of using services, equine-assisted activities therapy (EAAT) has been considered nonconventional intervention support the well-being veterans. In this qualitative study, 14 focus groups with 67 participants program volunteers staff veteran-led EAAT were conducted explore perspectives among current past in program. Five themes emerged: (a) benefits EAAT, (b) connections horses, (c) engagement,...
Here, we describe a motion stimulus in which the quality of rotation is fractal. This makes its unavailable to translation-based analysis known underlie much our perception. In contrast, normal can be extracted through aggregation outputs translational mechanisms. Neural adaptation these mechanisms thought drive after-effect, phenomenon prolonged viewing one direction leads percept opposite direction. We measured after-effects induced static and moving stimuli by fractal rotation. The found...
Several neuroimaging studies have revealed that the superior temporal sulcus (STS) is highly implicated in processing of facial motion. A limitation these investigations, however, many them utilize unnatural stimuli (e.g., morphed videos) or those which contain confounding spatial cues. As a result, underlying mechanisms may not be fully engaged during such perception. The aim current study was to build upon existing literature by implementing detailed and accurate models movement....
Both texture and motion can be strong cues to depth, estimating slant from considered analogous calculating parallax (Malik Rosenholtz 1994, report UCB/CSD 93/775, University of California, Berkeley, CA). A series experiments was conducted determine the relative weight in perception planar-surface when both convey similar information. Stimuli were monocularly viewed images planar surfaces slanted defined by information that could varied independently. Slant discrimination biases thresholds...
Abstract Aims The aim of the present study was to assess relationship between adolescent IQ and midlife alcohol use explore possible mediators this relationship. Methods Study data were from 6300 men women who participated in Wisconsin Longitudinal high-school students graduating 1957. scores collected during participants’ junior year high school. In 2004, participants reported number alcoholic beverages consumed (past 30 days) binge-drinking episodes. A multinomial logistic regression...
We report a study of motion-coherence and form-coherence in dyslexia using psychophysics fMRI. Deficits perceiving coherent motion have been reported dyslexia, but no differences form coherence previously found. measured thresholds for detecting Glass stimulus varying field random dots. A visual patch was depicted by dots separated rotational transformation space (form coherence) or space-time (motion coherence). Stimuli were presented 0.25s to prevent serial search strategies. Coherence...
Introduction: Research has associated reductions in the alpha power of occipital and parietal EEG (alpha suppression) with visual attentional processes memory load performance. The purpose current study was to determine effect facial (biological) motion on suppression. Methods: Participants viewed a continuous stream averaged captures. animations exhibited natural motion, were realistic appearance only differed way they moved (Hill & Johnston, 2001). task discriminate between successive by...