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Alterations to dual stream connectivity predicts response to aphasia therapy following stroke
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Cross-modal emotion recognition and autism-like traits in typically developing children
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An automated approach to examining pausing in the speech of people with dementia
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The influence of contextual constraint on verbal selection mechanisms and its neural correlates in Parkinson’s disease
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Alterations to dual stream connectivity predicts response to aphasia therapy following stroke
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The Suppression of Irrelevant Semantic Representations in Parkinson’s Disease
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Functional correlates of strategy formation and verbal suppression in Parkinson's disease
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Semantic processing in children with cochlear implants: evidence from event-related potentials
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Conversational trouble and repair in dementia: revision of an existing coding framework
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The suppression of irrelevant semantic representations in Parkinson's Disease
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Reading development in children with cochlear implants who communicate via spoken language: A psycholinguistic investigation
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Spelling in children with cochlear implants: evidence of underlying processing differences
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Lexical ambiguity resolution during sentence processing in Parkinson’s disease: An event-related potential study
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Semantic Feature Disturbance in Alzheimer Disease: Evidence from an Object Decision Task
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Abstract:
It is widely held that semantic disturbance in Alzheimer disease (AD) involves the loss of distinctive features but the relative sparing of nondistinctive features. Many previous studies of semantic feature disturbance have used cognitively challenging tasks with verbal stimuli that allow for potential cognitive confounds. Our objective was to use a task with lower memory demands to investigate distinctive feature disturbance in AD. We used an object decision task to compare the processing of distinctive and nondistinctive semantic features in people with AD and age-matched controls. The task included six conditions based on the relationship between each prime and target object. We tested the processing of distinctive and nondistinctive features by selectively altering distinctive and nondistinctive semantic features between prime and target pairs. Performance accuracy was significantly lower for participants with AD than for age-matched controls when distinctive features were manipulated, but no difference was found when nondistinctive features were manipulated. Our results provide evidence of semantic content disturbance in AD in the context of a task with low cognitive demands.
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Keyword:
2738 Psychiatry and Mental health; 2805 Cognitive Neuroscience; 3206 Neuropsychology and Physiological Psychology; Alzheimer disease; object decision; repetition priming; semantic features; semantic priming
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URL: https://espace.library.uq.edu.au/view/UQ:713395
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