1,720,973 research outputs found
Automatic classification of hand drawn geometric shapes using constructional sequence analysis
No full textAssessing visual inattention: study of inter-rater reliability
No full textThe Rivermead Behavioural Inattention Test is widely used for the detection of visual inattention. Differences in scoring can influence the diagnosis and treatment of patients. This study aims to investigate the inter-rater reliability between 11 assessors when marking 10 identical sets of responses from the test, and to explore inter-rater agreement in scoring individual tasks
Analysing constructional aspects of figure completion for the diagnosis of visuo-spatial neglect
No full textVisuospatial neglect (VSN) is a condition following a stroke or head injury whereby a patient fails to respond to stimuli on one side of the visual field. A standard clinical assessment technique for analysis of VSN is a pencil-and-paper based figure drawing task. Traditional static analysis of this task involves assessing the presence of the major components of the drawing. Marking of drawings is subjective, relying on assessors' own judgement and experience, and therefore no standardisation exists between assessors. Using a computer-based test capture system, this paper establishes a standardised performance assessment for a drawing task including a series of novel dynamic performance features pertaining to the timing and constructional aspects of test performance. A case study of two patients demonstrates the ability to detect VSN from a response which would have traditionally been assessed as normal and hence improve the sensitivity of the task
Diagnosis of Visuo-Spatial Neglect using Dynamic Sequence Features from a Cancellation Task
No full textVisuo-spatial neglect is recognised as a major barrier to recovery following a stroke or head injury. A standard clinical assessment technique to assess the condition is a pencil-and-paper based cancellation task. Traditional static analysis of this task involves counting the number of targets correctly cancelled on the test sheet. Using a computer-based test capture system, this paper presents the novel application of using a series of standard pattern recognition techniques to examine the diagnostic capability of a number of dynamic features relating to the sequence in which the targets were cancelled. While none of the individual dynamic features is as sensitive to neglect as the conventional static analysis, a series of standard multi-dimensional feature analysis techniques are shown to improve the classification accuracy of the dynamic properties of task execution, and hence the sensitivity to the detection of neglect and the validity of this novel application. Combining the outcome of the dynamic sequence-based features with the conventional static analysis further improves the overall sensitivity of the two cancellation tasks included in this study. The algorithmic nature of the methodology for feature extraction objectively and consistently assesses patients, thereby improving the repeatability of the task
Computer Analysis of Visuo-Spatial Function in the Assessment of Stroke Patients
No full textExisting post-stroke rehabilitation assessment includes a series of pencil and paper tests which serve as an indicator of neuropsychological conditions. The application of computer analysis of the patient's hand-written test response provides increased accuracy in clinical evaluation through assessment of both the traditional static test results and dynamic test data (pen velocity, test time etc.). Patient rehabilitation can be monitored as can the effectiveness of individual rehabilitation method
Optimisation Procedures for Diagnostic Processing of Hand-drawn Geometric Figures
No full textAn investigation into task and feature selection for analysing diagnostic drawings using handwriting dynamics and image processing techniques is presented. Performance across a standard test battery and a subset selection process for both features and tasks is examined. It is shown that a reduced task domain provides results which can identify trends in patient performance at a higher accuracy than is obtainable when the whole feature/task set is used
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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