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Variation in the genetic risk(s) of developing Parkinson's disease (PD) undoubtedly contributes to the subsequent phenotypic heterogeneity. Although patients with PD who undergo deep brain stimulation (DBS) are a skewed population, they represent a valuable resource for exploring the relationships between heterogeneous phenotypes and PD genetics. In this(More)
Several studies have shown that people with Alzheimer's disease (AD) demonstrate difficulties in doing two things at once or 'dual-tasking' and that this dual task impairment is insensitive to normal ageing, chronic depression or prodromal conditions like Mild Cognitive Impairment. It is not known, however, if this impairment is specific to AD, or also(More)
Although several studies have shown that dual-tasking ability is impaired in Alzheimer's disease (AD), the stage at which this deficit manifests remains unclear. This study investigated if a new paper-and-pencil assessment of dual-tasking ability could distinguish between AD, mild cognitive impairment (MCI) and normal ageing in a sample of 50 people with(More)
Academic success or ability is often assessed through peer review or the seemingly more objective method of citation ratings. However, citation ratings may be more objective in that they offer a more automated or mechanical method of assessing quality, but it does not necessarily follow that these ratings provide an assessment of genuine scientific impact.(More)
Although several studies have described dual-tasking ability in normal aging, Mild Cognitive Impairment and Alzheimer's disease, no normative data for dual-task performance exist. Dual-tasking ability of 436 healthy individuals, aged 16-88 years, was assessed using a new paper-and-pencil dual-task paradigm. In this study, no age effect was detected,(More)
Several studies have found dual tasking to be impaired in Alzheimer's disease (AD), but unaffected by healthy ageing. It is not known if this deficit is specific to AD, or also present in other neurodegenerative disorders that can occur in later life, such as Parkinson's disease (PD). Therefore, this study investigated dual tasking in 13 people with PD, 26(More)
PRIMARY OBJECTIVE To determine if people with traumatic brain injury (TBI) display deficits in dual tasking ability. RESEARCH DESIGN Observational and correlational research design used, to identify and describe the nature of dual task impairment in people with TBI. METHODS AND PROCEDURES Eighty-six people with TBI were assessed using a new standardized(More)
Diagnosis of Alzheimer's disease (AD) requires evidence of progressive decline in cognitive function. However, many tests used to assess cognitive function suffer from considerable practice effects, reducing their reliability. Several studies have reported that the ability to do two things at once, or dual tasking, is impaired in AD, but unaffected by(More)