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 15 of 15 for “"Bottom-up processing"”.
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The Top-Down and Bottom-Up Processing of Ongoing Speech by Aphasic Subjects
… in which aphasic subjects utilized top-down and bottom-up levels when processing ongoing speech. In individual sessions, 30 subjects (10 aphasic, 10 normal and 10 brain-damaged control) heard 288 test sentences which contained one member of one of 12 phonemically similar word pairs in one of …
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Attentional Control in Young Drivers: Does Training Help or Hinder Bottom-Up Processing in a Dynamic Driving Environment?
… on the road persisted with extraneous bottom-up stimuli in the road environment. Forty-one young drivers, aged 18-21, completed a series of driving scenarios with latent hazards, after completing RAPT or a placebo training, in a medium-fidelity driving simulator with their eyes tracked. …
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The Dominant Listening Strategy of Low-Proficiency Level Learners of Mandarin Chinese: Bottom-Up Processing or Top-Down Processing
… use the two main listening processes (top-down processing and bottom-up processing). In this study, 31 low-proficiency level Mandarin Chinese as a foreign language (CFL) learners from Brigham Young University took the Chinese Computer Adaptive Language Test (CCALT) and listened to four listening …
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Recognition of English vowels using top-down method
Many recognizers use bottom-up methods for recognizing each phoneme or feature, and use the cues and the context to find the most appropriate words or sentences. But humans recognize words not just through bottom-up processing, but also top-down. In many cases of listening, one can usually predict …
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Sensation vs. perception : a study and analysis of two methods affecting cognition
… sensation (outside stimulations/objective/bottom-up processing in neuroscience) or through perception (arousing background knowledge of inner mind/subjective/top-down processing in neuroscience). Similar effects can be reached through different ways. For example, to make something …
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Delineating the Neural Correlates of Visual Awareness through the Integration of Multimodal Neuroimaging and Noninvasive Electrical Neuromodulation
… Collectively, our findings suggest that suppression of eye-specific neural activity during rivalry is mainly due to bottom-up processing in early visual cortex, while fronto-parietal activity appears more generalized and predominantly related to attentional processes and conscious …
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Negotiated Tutoring: An Approach to Interaction in Intelligent Tutoring Systems
… and Jackendoff (1983). Our model ('GRAF' - GRouping Analysis with Frames) addresses a number of problems with Lerdahl and Jackendoff's theory, notably in describing how a number of unconscious processes in music cognition interact, including elements of top-down and bottom-up processing. GRAF …
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Dissecting emotion : towards a functional neuroimaging probe for affective disorders
… We hypothesized that the amygdala mediates ?bottom-up? processing driven by emotional stimulus content, and that the ventral prefrontal cortex and anterior cingulate cortex mediate ?top-down? processing driven by explicit knowledge or intention. In the first experiment, we tested whether …
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Nanoindentation of Annealed and As-Sputtered Thin Films of Nickel Titanium Shape Memory Alloys
The bottom-up processing techniques used for making Microelectromechanical systems (MEMS) devices can produce material properties different from bulk processing. The material properties must be evaluated with the process parameters used and for changes in the process parameters. The mechanical …
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Nanostructured architectures for colloidal quantum dot solar cells
… aligned arrays of ZnO nanowires can decouple absorption and collection: The nanowires penetrate into the QD film and serve as highly-conductive channels for extracting photogenerated electrons from deep within the film. After optimizing the nanowire growth and device fabrication …
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Using electrical stimulation for sensory restoration and modulation of attention
… recognition. This transformation involves both bottom-up processing (driven by signals from peripheral sensors to central neural circuits) and top-down modulation (in which attention and prior knowledge shape perceptual interpretation). For those suffering from sensory loss, electrical …
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A combined experimental and theoretical approach towards the understanding of transport in one-dimensional molecular nanostructures
… the critical strain values of structure rupture lie in the same range of their pristine SWCNT counterparts. This is directly verified by the first observations of these ring-like structures in a transmission electron microscopy. A merging process of asymmetric into symmetric rings is …
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Effects of bottom-up versus top-down cueing on conjunction search in 3-month old infants
… feature searches are thought to rely mainly on bottom-up attentional resources to localize a target, whereas conjunction searches are theorized to require both bottom-up and top-down attentional resources. Because infants have been shown to perform a feature search like that of adults but have …
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Multisensory Integration in adults with Attention-Deficit/Hyperactivity Disorder
… parietal cortex, lateral intraparietal, and superior temporal sulcus. Depending on the task demands and the complexity of the MI-stimuli, the attentional resources that are allocated are varying. While, salient, relative simply multimodal stimuli are integrated rather early - so-called …
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Diagnosing L2 English Learners’ Listening comprehension abilities with Scripted and Unscripted Listening Texts
… listening texts. Studies in which such processing has been discussed have lacked detailed diagnoses of how bottom-up and top-down processing interactively affect listeners’ comprehension. This study was designed to show how listeners’ process and comprehend texts, with a focus on how …