Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 160 for “"Visual Search"”.
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Attentional Guidance in Visual Search
Earlier research has shown that a task-irrelevant sudden onset of an object will capture or draw an observer's visual attention to that object (e.g., Yantis & Jonides, 1984). Further research however has demonstrated the apparent inability of an object with a task-irrelevant but unique color or …
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Modelling visual search for surface defects
… using texture synthesis methods and human search strategies will be captured by use of an eye tracker. Two di erent modelling approaches will be explored. A computational LNL-based model will be developed and compared to human performance in terms of the number of xations required to find …
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Visual search strategy and interception accuracy
… I addressed the questions of how visual search strategy and interception accuracy are influenced by constraints. Two experiments, manipulating spatial and temporal target motion configuration, assessed the role of constraints in interceptive aiming in interception accuracy and gaze …
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Two processing modes in visual search
… Integration Theory and Cave and Wolfe's Guided Search Model are currently the two most prominent and widely accepted theories of visual search. Each accounts for data in a variety of paradigms but it appears that the principal theoretical position of each, that individual attributes of objects …
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Variation in Visual Search Abilities and Performance
<p>Visual search, the process of detecting relevant items within an environment, is a vital skill required for navigating one's visual environment as well as for careers, such as radiology and airport security, that rely upon accurate searching. Research over the course of several decades has …
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Emotional and Cognitive Influences on Visual Search
… In the work described in this thesis, a visual search task was employed as a proxy for cognition while images of emotional facial expression served to influence emotional experience. Previous models of the interaction between emotion, cognition, and visual perception have focused on the …
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Visual search asymmetries in complex geophysical displays
… of task-critical information. The use of visual search asymmetries (Treisman & Souther, 1985) in the design of display iconography might be an effective technique for prioritizing important information in such displays, but only if the asymmetry persists in the presence of clutter. The …
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Semantic and phonological context effects in visual search
Visual search requires participants to search for a pre-specified target amongst a number of distractors. According to theories of visual search, attention is directed towards the target through a combination of stimulus-driven (bottom-up) and goal-driven (top-down) means. For example, when …
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Semi-Supervised Learning for Scalable and Robust Visual Search
Unlike textual document retrieval, searching of visual data is still far from satisfactory. There exist major gaps between the available solutions and practical needs in both accuracy and computational cost. This thesis aims at the development of robust and scalable solutions for visual search and …
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Axiomatic Explanations for Visual Search, Retrieval, and Similarity Learning
Visual search, recommendation, and contrastive similarity learning power technologies that impact billions of users worldwide. Modern model architectures can be complex and difficult to interpret, and there are several competing techniques one can use to explain a search engine’s behavior. We show …
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The effects of antihistamine use on visual search tasks
Previous research has shown that most antihistamines have sedative effects and can lead to deterioration of psychomotor performance. The objective of this research was to determine if two antihistamines (diphenhydramine and astemizole) administered at a therapeutic dose level will affect a …
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An exploration of conceptual similarity in multiple target visual search
Visual search studies generally suggest that multiple target visual search is more difficult and less efficient than traditional single target search, with costs to both RT and accuracy. Typically, these studies use dual target trials and abstract stimuli. A study by Laderoute (2021) using varying …
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The parallel nature of early visual processing in visual search
Visual search is a process that is ubiquitous in daily life. Some are relatively easy – looking for a red sock among black socks – while others are extremely difficult – looking for tumors in x-ray images. Classic theories and models of search have long assumed that these easy searches, referred to …
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Effects of Object Function on Visual Search in Real-World Scenes
… With the present study we extended current research on the use of affordances in visual searches of arrays to investigate whether guidance by affordance occurs in searches of real-world scenes and is the result of knowledge of target function (Experiment 1), and whether it is integrated with …
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What spatial reference frame is used for priming in visual search?
… This was achieved by using spatial priming in visual search. Spatial priming manifests itself in speeded detection times for a target when that target appears in the same location that it previously appeared in (Shore & Klein, 2001). Target locations can be defined in either egocentric (i.e. …
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Parallel processing of efficient, heterogeneous visual search with real-world objects
… work in our lab has demonstrated that efficient visual search has a reaction time by set size function that is best characterized by logarithmic curves, and the steepness of these logarithmic curves is determined by the similarity between target and distractor items (Buetti et al., in press). …
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A computational model of serial and parallel processing in visual search
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-12-01
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Measuring Memory in an Alzheimer's Treatment Trial Using a Visual Search Task
… in flickering natural scenes, yielding faster search times for remembered targets than for forgotten ones. AD patients took longer and required more fixations to detect targets, indicating impaired memory. Furthermore, the AD and aged populations exhibited slower pupillary responses. As part of …
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Visual Search Strategies of Elite Baseball Players During a Baseball Hitting Task
… to the quick duration of an at-bat, anticipatory visual cues and predictive eye movements are needed to have an accurate final fixation while initiating bat swing. Previous research has demonstrated expert hitters have superior dynamic visual acuity and superior visual search strategies. However, …
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Measuring Team Collaboration and Effects of Target Guidance in a Visual Search Task
… medical operations, involve a team of operators searching for a target on a common visual display. Previous works on collaborative visual search employed analysis of mean response time (RT) and error rates, which may not offer direct measurement of the capacity of a team nor changes in …
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