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dc.contributor.authorBrown, David J
dc.identifier.citationBrown, D.J. 2015. Complexity, the auditory system, and perceptual learning in naïve users of a visual-to-auditory sensory substitution device. Queen Mary University of London.en_US
dc.description.abstractSensory substitution devices are a non-invasive visual prostheses that use sound or touch to aid functioning in the blind. Algorithms informed by natural crossmodal correspondences convert and transmit sensory information attributed to an impaired modality back to the user via an unimpaired modality and utilise multisensory networks to activate visual areas of cortex. While behavioural success has been demonstrated in non-visual tasks suing SSDs how they utilise a metamodal brain, organised for function is still a question in research. While imaging studies have shown activation of visual cortex in trained users it is likely that naïve users rely on auditory characteristics of the output signal for functionality and that it is perceptual learning that facilitates crossmodal plasticity. In this thesis I investigated visual-to-auditory sensory substitution in naïve sighted users to assess whether signal complexity and processing in the auditory system facilitates and limits simple recognition tasks. In four experiments evaluating; signal complexity, object resolution, harmonic interference and information load I demonstrate above chance performance in naïve users in all tasks, an increase in generalized learning, limitations in recognition due to principles of auditory scene analysis and capacity limits that hinder performance. Results are looked at from both theoretical and applied perspectives with solutions designed to further inform theory on a multisensory perceptual brain and provide effective training to aid visual rehabilitation.en_US
dc.description.sponsorshipQueen Mary University of Londonen_US
dc.publisherQueen Mary University of Londonen_US
dc.subjectComputer Scienceen_US
dc.subjectAssistive technologyen_US
dc.subjectAccessible technologyen_US
dc.subjectAudio computer outputen_US
dc.subjectVisual-to-auditory sensory substitutionen_US
dc.subjectBlind computer usersen_US
dc.titleComplexity, the auditory system, and perceptual learning in naïve users of a visual-to-auditory sensory substitution device.en_US
dc.rights.holderThe copyright of this thesis rests with the author and no quotation from it or information derived from it may be published without the prior written consent of the author

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