ORCID Profile
0000-0002-0435-571X
Current Organisation
University of Oxford
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Publisher: Informa UK Limited
Date: 16-03-2017
Publisher: Elsevier BV
Date: 10-2015
Publisher: Informa UK Limited
Date: 26-11-2015
Publisher: Center for Open Science
Date: 25-02-2020
Abstract: ObjectiveHere, we present the Oxford Cognitive Screen-Plus, a computerised tablet-based screen designed to briefly assess domain-general cognition and provide more fine-grained measures of memory and executive function. The OCS-Plus was designed to sensitively screen for cognitive impairments and provide a differentiation between memory and executive deficits. MethodsThe OCS-Plus contains 10 subtasks and requires approximately 24 minutes to complete. In this study, 320 neurologically healthy ageing participants (age M=62.66, SD=13.75) from three sites completed the OCS-Plus. The convergent validity of this assessment was established in comparison to the ACE-R, CERAD and Rey-Osterrieth. Divergent validity was established through comparison with the BDI and tests measuring ergent cognitive-domains. Internal consistency of each subtask was evaluated, and test-retest reliability was determined. ResultsWe established the normative impairment cut-offs for each of the subtasks. Predicted convergent and ergent validity was found, high internal consistency for most measures was also found with the exception of restricted range tasks, as well as strong test-retest reliability, which provided evidence of test stability. Further research demonstrating the use and validity of the OCS-Plus in various clinical populations is required.ConclusionThe OCS-Plus is presented as a standardised cognitive assessment tool, normed and validated in a s le of neurologically healthy participants. The OCS-Plus will be available as an Android App and provides an automated report of domain-general cognitive impairments in executive attention and memory.
Publisher: Elsevier BV
Date: 04-2012
Publisher: Center for Open Science
Date: 18-11-2020
Abstract: ObjectiveComplex Figure Copy Tasks are one of the most commonly employed neuropsychological tests. However, manual scoring of this test is time-consuming, requires training, and can then still be inconsistent between different examiners. We aimed to develop and evaluate a novel, automated method for scoring a tablet-based Figure Copy Task. MethodA cohort of 261 healthy adults and 203 stroke survivors completed the computerised Oxford Cognitive Screen – Plus Figure Copy Task. Responses were independently scored by two trained human raters and by a novel automated scoring program. ResultsOverall, the Automated Scoring Program was able to reliably extract and identify the separate figure elements (average sensitivity and specificity of 92.10% and 90.20% respectively) and assigned total scores which agreed well with manual scores (ICC = .83). Receiver Operating Curve analysis demonstrated that, compared to overall impairment categorisations based on manual scores, the Automated Scoring Program had an overall sensitivity and specificity of 80% and 93.40% respectively (AUC = 86.70%). Automated total scores also reliably distinguished between different clinical impairment groups with acute stroke survivors scoring significantly worse than longer term survivors, which in turn scored worse than neurologically healthy adults. ConclusionsThese results demonstrate that the novel automated scoring algorithm was able to reliably extract and accurately score Figure Copy Task data, even in cases where drawings were highly distorted due to comorbid fine-motor deficits. This represents a significant advancement as this novel technology can be employed to produce immediate, unbiased, and reproducible scores for Figure Copy Task responses in clinical and research environments.
Publisher: American Psychological Association (APA)
Date: 03-2029
DOI: 10.1037/NEU0000748
Publisher: SAGE Publications
Date: 2018
Abstract: For in iduals with stimulus-parity synaesthesia, eliciting stimuli (e.g., shapes, numbers, letters, colours) trigger a compelling feeling of oddness or evenness. Given that (a) many inducers are conceptual and (b) parity is itself a conceptual property, one questions whether stimulus-parity synaesthesia will be a categorically higher subtype, such that the conceptual properties of stimuli will be crucial in determining parity. We explore this question as it applies to Synaesthete R, one of only two stimulus-parity synaesthetes known to the contemporary literature. In Experiments 1 and 2, we examine whether parity is tied to concepts or percepts, asking, for ex le, whether a rectangle is even regardless of whether it is presented as an image or a word. Our results indicate that the parity of shapes (words and images), numbers (words, digits, and Roman numerals), and letters (lowercase and uppercase) differs according to the stimulus format, supporting a perceptual explanation. In Experiment 3, we examine the parity of colour stimuli, showing a systematic relationship between the measurable physical properties of hue, saturation, and lightness and synaesthetic parity. Despite the conceptual nature of inducers and concurrents, for Synaesthete R, stimulus-parity synaesthesia is a lower subtype perceptual properties of stimuli determine parity.
Location: Romania
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Mihaela Duta.