Browsing by Author "Xu, Yaoda"
Now showing items 1-18 of 18
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The association of color memory and the enumeration of multiple spatially overlapping sets
Poltoratski, Sonia; Xu, Yaoda (Association for Research in Vision and Ophthalmology (ARVO), 2013)Using dot displays, Halberda, Sires, and Feigenson (2006) showed that observers could simultaneously encode the numerosity of two spatially overlapping sets and the superset of all items at a glance. With the brief display ... -
Behaviorally Relevant Abstract Object Identity Representation in the Human Parietal Cortex
Jeong, Su; Xu, Yaoda (Society for Neuroscience, 2016)The representation of object identity is fundamental to human vision. Using fMRI and multivoxel pattern analysis, here we report the representation of highly abstract object identity information in human parietal cortex. ... -
The Contribution of Object Shape and Surface Properties to Object Ensemble Representation in Anterior-medial Ventral Visual Cortex
Cant, Jonathan S.; Xu, Yaoda (MIT Press - Journals, 2017)Our visual system can extract summary statistics from large collections of objects without forming detailed representations of the individual objects in the ensemble. In a region in ventral visual cortex encompassing the ... -
Distinctive Neural Mechanisms Supporting Visual Object Individuation and Identification
Xu, Yaoda (MIT Press, 2009)Many everyday activities, such as driving on a busy street, require the encoding of distinctive visual objects from crowded scenes. Given resource limitations of our visual system, one solution to this difficult and ... -
Flexible visual information representation in human parietal cortex
Jeong, Su Keun (2014-10-21)In many everyday activities, we must visually process multiple objects embedded in complex real world scenes. Our visual system can flexibly extract behaviorally relevant visual information from such scenes, even though ... -
The impact of item clustering on visual search: It all depends on the nature of the visual search
Xu, Yaoda (Association for Research in Vision and Ophthalmology (ARVO), 2010)Decades of vision research on how people search for a target item among distractor items have always avoided item clustering. Instead, researchers made sure that items were evenly distributed in search displays. This, ... -
Inferior frontal junction biases perception through neural synchrony
Xu, Yaoda (Elsevier BV, 2014)How the primate attentional control network interacts with posterior sensory regions to bias perception is not fully understood. Using magnetoencephalography (MEG) supplemented by functional magnetic resonance imaging ... -
Neural Decoding Reveals Impaired Face Configural Processing in the Right Fusiform Face Area of Individuals with Developmental Prosopagnosia
Zhang, Jiedong; Liu, Jia; Xu, Yaoda (Society for Neuroscience, 2015)Most of human daily social interactions rely on the ability to successfully recognize faces. Yet ∼2% of the human population suffers from face blindness without any acquired brain damage [this is also known as developmental ... -
The Neural Fate of Task-Irrelevant Features in Object-Based Processing
Xu, Yaoda (Society for Neuroscience, 2010)Objects are one of the most fundamental units in visual attentional selection and information processing. Studies have shown that, during object-based processing, all features of an attended object may be encoded together, ... -
Neural Representation of Targets and Distractors during Object Individuation and Identification
Jeong, Su Keun; Xu, Yaoda (Massachusetts Institute of Technology Press (MIT Press), 2012)In many everyday activities, we need to attend and encode multiple target objects among distractor objects. For example, when driving a car on a busy street, we need to simultaneously attend objects such as traffic signs, ... -
Object Ensemble Processing in Human Anterior-Medial Ventral Visual Cortex
Cant, Jonathan S.; Xu, Yaoda (Society for Neuroscience, 2012)Our visual system can extract summary statistics from large collections of similar objects without forming detailed representations of the individual objects in the ensemble. Such object ensemble representation is adaptive ... -
Orthographic and Phonological Effects in the Picture–word Interference Paradigm: Evidence From a Logographic Language
Bi, Yanchao; Xu, Yaoda; Caramazza, Alfonso (Cambridge University Press, 2009)One important finding with the picture–word interference paradigm is that picture-naming performance is facilitated by the presentation of a distractor (e.g., CAP) formally related to the picture name (e.g., “cat”). In two ... -
Representing Connected and Disconnected Shapes in Human Inferior Intraparietal Sulcus
Xu, Yaoda (Elsevier, 2008)Although human lesion data have indicated the importance of the parietal cortex in object-based representations, our understanding of parietal object grouping and selection mechanisms in normal observers remains largely ... -
The Role of Transverse Occipital Sulcus in Scene Perception and Its Relationship to Object Individuation in Inferior Intraparietal Sulcus
Bettencourt, Katherine; Xu, Yaoda (MIT Press - Journals, 2013)The parietal cortex has been functionally divided into various subregions; however, very little is known about how these areas relate to each other. Two such regions are the transverse occipital sulcus (TOS) scene area and ... -
Selecting and Perceiving Multiple Visual Objects
Xu, Yaoda; Chun, Marvin M. (Elsevier Science, 2009)To explain how multiple visual objects are attended and perceived, we propose that our visual system first selects a fixed number of about four objects from a crowded scene based on their spatial information (object ... -
Understanding location- and feature-based processing along the human intraparietal sulcus
Bettencourt, Katherine; Xu, Yaoda (American Physiological Society, 2016)Based on different cognitive tasks and mapping methods, the human intraparietal sulcus (IPS) has been subdivided according to multiple different organizational schemes. The presence of topographically organized regions ... -
Visual Grouping in Human Parietal Cortex
Xu, Yaoda; Chun, Marvin M. (National Academy of Sciences, 2007)To efficiently extract visual information from complex visual scenes to guide behavior and thought, visual input needs to be organized into discrete units that can be selectively attended and processed. One important such ... -
Visual Short-Term Memory Benefit for Objects on Different 3-D Surfaces
Xu, Yaoda; Nakayama, Ken (American Psychological Association, 2007)Visual short-term memory (VSTM) plays an important role in visual cognition. Although objects are located on different 3-dimensional (3-D) surfaces in the real world, how VSTM capacity may be influenced by the presence of ...