The Experts below are selected from a list of 38385 Experts worldwide ranked by ideXlab platform
Yuhong V. Jiang - One of the best experts on this subject based on the ideXlab platform.
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indirect assessment of visual working memory for simple and complex objects
Memory & Cognition, 2008Co-Authors: Tal Makovski, Yuhong V. JiangAbstract:Previous research has shown that visual search performance is modulated by the current contents in visual working memory (VWM), even when the contents of VWM are irrelevant to the search task. For example, visual search is faster when the target—rather than a distractor—is surrounded by a shape currently held in VWM. This study uses the modulation of visual search by VWM to investigate properties of VWM. Participants were asked to remember the color or the shape of novel polygons whose “goodness” of figure varied according to Garner’s (1962) rotation and Reflection Transformation principle. During the memory retention interval, participants searched for a tilted line among vertical lines embedded inside colored polygons. Search was faster when the target—rather than a distractor—was enclosed by the remembered polygons. The congruity effect diminished with increasing memory load and decreasing figure goodness. We conclude that congruity effects in visual search can indirectly assess VWM representation strength.
Tal Makovski - One of the best experts on this subject based on the ideXlab platform.
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indirect assessment of visual working memory for simple and complex objects
Memory & Cognition, 2008Co-Authors: Tal Makovski, Yuhong V. JiangAbstract:Previous research has shown that visual search performance is modulated by the current contents in visual working memory (VWM), even when the contents of VWM are irrelevant to the search task. For example, visual search is faster when the target—rather than a distractor—is surrounded by a shape currently held in VWM. This study uses the modulation of visual search by VWM to investigate properties of VWM. Participants were asked to remember the color or the shape of novel polygons whose “goodness” of figure varied according to Garner’s (1962) rotation and Reflection Transformation principle. During the memory retention interval, participants searched for a tilted line among vertical lines embedded inside colored polygons. Search was faster when the target—rather than a distractor—was enclosed by the remembered polygons. The congruity effect diminished with increasing memory load and decreasing figure goodness. We conclude that congruity effects in visual search can indirectly assess VWM representation strength.
Jiro Gyoba - One of the best experts on this subject based on the ideXlab platform.
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self rated autistic like traits and capacity of visual working memory
Psychological Reports, 2012Co-Authors: Junichi Takahashi, Jiro GyobaAbstract:The effect on the capacity of visual working memory of spatial complexity (as defined by Garner's principle) in rotation and Reflection Transformation was examined in persons differing along the Autism Spectrum Quotient (AQ), using a change-detection task. On each trial, nine line segments were arrayed in simple, medium, and complex configurations, which were presented in memory and test displays. 27 participants (8 men, 19 women; M age = 22.3 yr., SD = 2.7) were asked whether the orientations of stimuli between two displays were the same or different. On the basis of their AQ scores out of 50 (M AQ scores = 20.9, SD = 6.3), the participants were divided into groups with high (n = 13; M AQ scores = 26.2, SD = 4.1) and low (n = 12; M AQ scores = 15.3, SD = 2.7) self-reported autistic-like traits (High and Low AQ groups, 2 excluded for scores at the median). The results showed that spatial complexity affects the capacity of visual working memory for the Low AQ group but not for the High AQ group, suggesting the functional dissociation of spatial configuration and visual working memory in the High AQ group.
Junichi Takahashi - One of the best experts on this subject based on the ideXlab platform.
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self rated autistic like traits and capacity of visual working memory
Psychological Reports, 2012Co-Authors: Junichi Takahashi, Jiro GyobaAbstract:The effect on the capacity of visual working memory of spatial complexity (as defined by Garner's principle) in rotation and Reflection Transformation was examined in persons differing along the Autism Spectrum Quotient (AQ), using a change-detection task. On each trial, nine line segments were arrayed in simple, medium, and complex configurations, which were presented in memory and test displays. 27 participants (8 men, 19 women; M age = 22.3 yr., SD = 2.7) were asked whether the orientations of stimuli between two displays were the same or different. On the basis of their AQ scores out of 50 (M AQ scores = 20.9, SD = 6.3), the participants were divided into groups with high (n = 13; M AQ scores = 26.2, SD = 4.1) and low (n = 12; M AQ scores = 15.3, SD = 2.7) self-reported autistic-like traits (High and Low AQ groups, 2 excluded for scores at the median). The results showed that spatial complexity affects the capacity of visual working memory for the Low AQ group but not for the High AQ group, suggesting the functional dissociation of spatial configuration and visual working memory in the High AQ group.
Bianco Andrea - One of the best experts on this subject based on the ideXlab platform.
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Characterization and visualization of reflective properties of surfaces
2017Co-Authors: Bianco AndreaAbstract:Images play a vital role in several fields of natural science research, including biology, physics, astrophysics, and computer science. In the natural sciences, images are commonly used in measurements or documentation; such applications include images made with telescopes, optical microscopes, or electron microscopes. In the humanities, images also play an important role in research. In art history, for example, many different types of images, from photos of small objects to three-dimensional reconstructions of buildings, help art historians to develop theories, to discuss them with other scholars, and to document the current state of artworks, e.g. in the process of restoration. This is particularly useful if the object is not easily accessible, in which case a common solution is to work with photographs. Digital photography has simplified the process of visual representation, because digital images can be easily shared and made accessible. However, when it comes to more complex kinds of artworks like mosaics, these static and two-dimensional images are not able to reproduce the actual visual impression of the object. Similar considerations apply to a variety of other artifacts, such as early prints, books, parchments, and textiles. The challenge in the digitization of of these objects lies in their complex surface properties and Reflection behavior. A promising way to solve those limitations is the use of Reflectance Transformation Imaging. RTI is a set of computational photographic methods that capture a subject’s surface shape and color, making it possible to interactively re-light the subject from any direction by means of a mathematical model. The major drawback of RTI is the limitation of the applied mathematical model. Other drawbacks are the RTI imaging workflow and the fact that display of RTI requires a particular stand-alone application. In this thesis, the author developed a data-driven scientific approach to reproduce surfaces composed of lambertian and glossy materials using the RTI technique with as few parameters as possible. This new approach has been called eRTI (enhanced Reflection Transformation Imaging). Furthermore the hardware needed to acquire RTI and eRTI has been improved, by collaborating with a local Swiss firm to develop a novel solution for image acquisition. Lastly a web-based viewer has been developed, to render eRTI images in any standard web browser, even on most mobile devices. The qualities of eRTI have been tested using a novel approach that includes a quantitative and a qualitative method. The results show agreement between the techniques