1,720,978 research outputs found
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
EFFECTS OF HEMISHERE-SPECIFIC STIMULATION VERSUS READING-FOCUSED TRAINING IN DYSLEXIC CHILDREN
No full textTwo groups of children with developmental dyslexia were treated over a
period of four months. Fourteen children received visual hemisphere-specific
stimulation (VHSS) and 11 children were treated with a customary,
reading-focused training programme (RT). Reading performance was
investigated before and after treatment, as were spelling abilities, phonemic
awareness and verbal memory. Improvement in reading accuracy was
significantly greater in the VHSS group than in the RT group. Significant
improvements were also observed for memory and phonemic skills. The
results were compared to existing data on spontaneous reading development.
The better results after single-hemisphere stimulation (VHSS) are discussed
in terms of the specific characteristics of the treatment, and of the possible
contributions of visual-spatial attention, memory functions and phonemic
awareness
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
Sluggish engagement and disengagement of non-spatial attention in dyslexic children.
No full textAlthough the dominant view posits that developmental dyslexia arises from a deficit in phonological processing and memory, efficient phonological decoding requires precise visual selection of graphemes. Therefore, visual engagement and disengagement of non-spatial attention were studied in 13 dyslexic children and 13 chronological age and intelligence quotient (IQ) matched normally reading children by measuring “attentional masking” (AM) and “attentional blink” (AB) effects. AM refers to an impaired identification of the first (T1) of two rapidly sequential targets (i.e., attentional engagement). In contrast, AB refers to an impaired identification of the second target in the sequence (T2; i.e., attentional disengagement). The results revealed a specific temporal deficit of AM as well as of AB in dyslexic children. Our results showed that the abnormality in AM and AB is rather widespread, since 77% and 54% of dyslexic children deviated at least 1 standard deviation (SD) from the mean of the controls, respectively, for the two deficits. We further showed that individual differences in non-spatial attention were specifically related to nonword reading ability. These results suggest that non-spatial attention deficits (possibly related to a parietal cortex dysfunction) may selectively impair the reading development via sub-lexical mechanisms
Sluggish engagement and disengagement of non-spatial attention in dyslexic children
No full textAlthough the dominant view posits that developmental dyslexia arises from a deficit in phonological
processing andmemory, efficient phonological decoding requires precise visual selection
of graphemes. Therefore, visual engagement and disengagement of non-spatial
attention were studied in 13 dyslexic children and 13 chronological age and intelligence quotient
(IQ) matched normally reading children by measuring ‘‘attentional masking’’ (AM) and
‘‘attentional blink’’ (AB) effects.AMrefers to an impaired identification of the first (T1) of two
rapidly sequential targets (i.e., attentional engagement). In contrast, AB refers to an impaired
identification of the second target in the sequence (T2; i.e., attentional disengagement). The
results revealed a specific temporal deficit ofAMas well as of AB in dyslexic children. Our results
showed that the abnormality in AM and AB is rather widespread, since 77% and 54% of
dyslexic children deviated at least 1 standard deviation (SD) from the mean of the controls,
respectively, for the two deficits. We further showed that individual differences in non-spatial
attention were specifically related to nonword reading ability. These results suggest that
non-spatial attention deficits (possibly related to a parietal cortex dysfunction) may selectively
impair the reading development via sub-lexical mechanisms
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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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