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92 results on '"S, Barton"'

4. The brain frequency tuning function for facial emotion discrimination: An ssVEP study

Author

Todd C. Handy, Esther Alonso-Prieto, Maria Zhu, and Jason J. S. Barton

Subjects
Adult, Male, genetic structures, Computer science, Emotions, 050105 experimental psychology, Temporal lobe, 03 medical and health sciences, Young Adult, 0302 clinical medicine, Face perception, medicine, Humans, 0501 psychology and cognitive sciences, Facial expression, Fusiform gyrus, business.industry, 05 social sciences, Pattern recognition, Human brain, Superior temporal sulcus, Sensory Systems, Expression (mathematics), Temporal Lobe, Facial Expression, Ophthalmology, medicine.anatomical_structure, Evoked Potentials, Visual, Female, Artificial intelligence, Occipital Lobe, business, Occipital lobe, 030217 neurology & neurosurgery, Cognitive psychology
Abstract

Steady-state visual evoked potentials have only been applied recently to the study of face perception. We used this method to study the spatial and temporal dynamics of expression perception in the human brain and test the prediction that, as in the case of identity perception, the optimal frequency for facial expression would also be in the range of 5-6 Hz. We presented facial expressions at different flickering frequencies (2-8 Hz) to human observers while recording their brain electrical activity. Our modified adaptation paradigm contrasted blocks with varying expressions versus blocks with a constant neutral expression, while facial identity was kept constant. The presentation of different expressions created a larger steady-state response only at 5 Hz, corresponding to a cycle of 200 ms, over right occipito-temporal electrodes. Source localization using a time-domain analysis showed that the effect localized to the right occipito-temporal cortex, including the superior temporal sulcus and fusiform gyrus.

Published
2016

14. Tone deafness in developmental prosopagnosia - is there a common cause?

Author

Gottfried Schlaug, Stephanie S. Buss, H. Charles Li, Jason J. S. Barton, Jacob L. Stubbs, and Sherryse Corrow

Subjects
medicine.medical_specialty, 05 social sciences, Audiology, 050105 experimental psychology, Sensory Systems, 03 medical and health sciences, Ophthalmology, 0302 clinical medicine, Tone deafness, Common cause and special cause, medicine, 0501 psychology and cognitive sciences, Psychology, 030217 neurology & neurosurgery
Published
2016
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15. Scan patterns during the processing of facial expression versus identity: an exploration of task-driven and stimulus-driven effects

Author

Linda Lanyon, Jason J. S. Barton, Andrew J. B. Fugard, and George L. Malcolm

Subjects
Adult, Male, media_common.quotation_subject, Emotions, Fixation, Ocular, Anger, Stimulus (physiology), Thinking, Judgment, Mental Processes, Face perception, Perception, Humans, media_common, Facial expression, Eye movement, Recognition, Psychology, Fixation (psychology), Sensory Systems, Expression (mathematics), Facial Expression, Ophthalmology, Face, Female, Psychology, Social psychology, Photic Stimulation, Cognitive psychology
Abstract

Perceptual studies suggest that processing facial identity emphasizes upper-face information, whereas processing expressions of anger or happiness emphasizes the lower-face. The two goals of the present study were to determine (a) if the distributions of eye fixations reflect these upper/lower-face biases, and (b) whether this bias is task- or stimulus-driven. We presented a target face followed by a probe pair of morphed faces, neither of which was identical to the target. Subjects judged which of the pair was more similar to the target face while eye movements were recorded. In Experiment 1 the probe pair always differed from each other in both identity and expression on each trial. In one block subjects judged which probe face was more similar to the target face in identity, and in a second block subjects judged which probe face was more similar to the target face in expression. In Experiment 2 the two probe faces differed in either expression or identity, but not both. Subjects were not informed which dimension differed, but simply asked to judge which probe face was more similar to the target face. We found that subjects scanned the upper-face more than the lower-face during the identity task but the lower-face more than the upper-face during the expression task in Experiment 1 (task-driven effects), with significantly less variation in bias in Experiment 2 (stimulus-driven effects). We conclude that fixations correlate with regional variations of diagnostic information in different processing tasks, but that these reflect top-down task-driven guidance of information acquisition more than stimulus-driven effects.

Published
2007

17. Symbolic object representation in visual cortex

Author

Jason J. S. Barton, Jodie Davies-Thompson, and Taim Muayqil

Subjects
Ophthalmology, Visual cortex, medicine.anatomical_structure, Form perception, business.industry, Computer science, medicine, Representation (systemics), Computer vision, Artificial intelligence, Object (computer science), business, Sensory Systems
Published
2014
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25. Describing the temporal dynamics of the face familiarity effect: Bootstrap analysis of single subject ERP data

Author

Kirsten A. Dalrymple, Jason J. S. Barton, Ipek Oruc, Esther Alonso-Prieto, and Raika Pancaroglu

Subjects
Communication, business.industry, Computer science, computer.software_genre, Bootstrap analysis, Sensory Systems, Ophthalmology, Dynamics (music), Face (geometry), Subject (grammar), Artificial intelligence, business, computer, Natural language processing
Published
2013
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26. As the nose on your face: face-superiority context effect in a simple line orientation detection task

Author

Linda Lanyon, Thomas Busigny, Bruno Rossion, and Jason J. S. Barton

Subjects
Communication, Context effect, Orientation (computer vision), business.industry, Computer science, Sensory Systems, Task (project management), Ophthalmology, medicine.anatomical_structure, Simple (abstract algebra), Face (geometry), Line (geometry), medicine, Computer vision, Artificial intelligence, business, Nose
Published
2013
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36. Text adaptation: Aftereffects for word-identity and handwriting-style, and the effect of the orthogonal variable

Author

Brielle L. Perler, Hashim M. Hanif, and Jason J. S. Barton

Subjects
Ophthalmology, Communication, Handwriting, business.industry, Speech recognition, Identity (object-oriented programming), Psychology, business, Adaptation (computer science), Sensory Systems, Word (computer architecture), Style (sociolinguistics), Variable (mathematics)
Published
2012
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49. Eying the eyes in social scenes: Diminished importance of social attention in simultanagnosia

Author

Elina Birmingham, Alan Kingstone, Brielle L. Perler, Jason J. S. Barton, Walter F. Bischof, Kirsten A. Dalrymple, and Alexander K. Gray

Subjects
Ophthalmology, medicine, Healthy subjects, Visual attention, Social attention, medicine.symptom, Psychology, Sensory Systems, Simultanagnosia, Task (project management), Cognitive psychology
Abstract

Both GB and the Gaze-Contingent group understand that the eyes are important (as indicated by the infer condition), but the value of the eyes is compromised when visual attention is restricted (as indicated by both the describe and infer conditions). In short, much of the informative value of eyes seems to be lost when the global picture is visually unavailable. We tested this hypothesis by increasing the importance of the eyes with a di erent task. Healthy subjects who viewed the scenes normally (Full-View controls), a group of healthy subjects who viewed the scenes through a gaze-contingent display (Gaze-Contingent group) and a simultanagnosic patient (GB) performed two separate tasks with the scenes: 1) Describe: Verbally describe the scene 2) Infer attention: Verbally infer where the people in the scene are directing their attention Each task was performed twice. The order of the tasks was counterbalanced .

Published
2011
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