1,720,962 research outputs found
Processing capacity limitations in pictorial and spatial representations in the totally congenitally blind.
No full textThe study of visuo-spatial imagery abilities in totally congenitally blind people may be instrumental in understanding the contribution of visual experience to imagery processes. In the present paper visuo-spatial imagery capacity was explored through a task devised by Kerr (1987) and adapted for presentation to the blind, in which subjects were asked to imagine either two- or three-dimensional matrices of different complexity and to follow a mental pathway. The first experiment showed that blind people have difficulty with three-dimensional matrices which are within the reach of sighted people, and that their performance is affected by the processing rate. In the second experiment the spatial and pictorial components of visual imagery were analyzed by way of the same spatial task and of a pictorial-tactual task in which subjects had to match a mental representation of a pathway to a tactually explored wire silhouette. On the latter task, blind people did not meet any particular difficulty, probably because they could form representations using other sensory modalities and because they were skillful in tactual exploration. These data suggest that research on the blind cannot easily contribute to the distinction between the spatial and pictorial components of visual imagery
Cognitive functioning in children with cerebral visual impairment: early development and outcome at 5 years of age
No full text
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
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Correlation between visual function, neurodevelopmental outcome and MRI findings in infants with periventricular leukomalacia
No full textCorrelation between visual function, neurodevelopmental outcome, and magnetic resonance imaging findings in infants with periventricular leucomalacia RID F-1503-2010
No full textAim-To evaluate the correlation between visual function and neurodevelopmental outcome in children with periventricular leucomalacia at 1 and 3 years. Method-Visual acuity, visual field, ocular motility, and optokinetic nystagmus were tested in 29 infants with periventricular leucomalacia by brain magnetic resonance imaging. All infants also had a structured neurological examination and a Griffiths developmental assessment. Results-21 of the infants showed at least one abnormality of visual function. The degree of visual impairment-that is, the number of visual tests showing abnormal results-correlated well with the results on developmental assessment at both ages. Conclusion-Multivariate analysis showed that visual impairment was the most important variable in determining the neurodevelopmental scores of these infants, more than their motor disability and the extent of their lesions on magnetic resonance imaging
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