1,720,965 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Perceptueel leren van taak-irrelevante subliminale stimuli
No full textTaak-irrelevant perceptueel leren houdt in dat features van stimuli die niet geattendeerd worden toch geleerd kunnen worden. Dit uit zich door een verbeterde prestatie wanneer die specifieke features getest worden na training. Watanabe, Nañez en Sasaki (2001) en Seitz en Watanabe (2003) vonden dat ook subliminale features (i.e. oriëntatie van bewegende stimuli), die zelfs niet percipieerbaar waren wanneer ze geattendeerd werden, toch geleerd konden worden. Zij verklaarden dat dit leren gebeurde door de verspreiding van diffuse bekrachtigingssignalen, gemoduleerd door dopamine. Een biologisch meer plausibele mogelijkheid is echter dat het leren gebeurde door arousal, gemoduleerd door noradrenaline. In bovenstaande experimenten waren deze twee alternatieven niet te onderscheiden. Het doel van de huidige studie is dan ook de bekrachtigingsvisie te contrasteren met de arousalvisie. Hoewel de data een aantal beperkingen hebben, bleek de arousalvisie beter geschikt om de resultaten te verklaren. Vervolgens worden een aantal mogelijke neuronale mechanismen voorgesteld die dit leren concreet kunnen implementeren. Daarna wordt de rol van top-down aandachtsmechanismen besproken. De evidentie uit dit onderzoek en de bevindingen uit de literatuur leiden tot een denkkader dat een interactie tussen corticale top-down invloeden, sensorische informatie en subcorticale neuromodulatie veronderstelt. Hiermee wordt gepoogd visueel leren beter te begrijpen. Daarenboven worden mogelijke pistes voor verder onderzoek besproken.info:eu-repo/semantics/nonPublishe
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe 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
Is consciousness graded or dichotomous?
No full textThis experiment aims to shed light on an ongoing controverse in the visual awareness literature. One aspect of the debate between the Global Workspace Theory and the Recurrent Processing Hypothesis is how the transition from unconscious processing to a conscious experience takes place. When postmasked stimuli are shown for parametrically varied durations, the former assumes an all-or-none transition (stimuli remain unconscious until the presentation duration is sufficient to generate a sudden clear experience), whereas the latter assumes a graded transition (the longer the presentation time, the gradually better the visibility). Here we intend to bring the two theories and their supporting evidence together, by taking the level of processing of stimuli into account. Participants performed a low-level (categorizing colored patches as red or blue) or a high-level task (categorizing numbers as smaller or larger than 5). Postmasked stimuli were presented for 10 ms up to 80 ms in steps of 10 ms. The psychophysical detection curve for the low-level task showed a graded pattern. The curve for the high-level task showed an all-or-none pattern. We hypothesize that high-level stimuli require access to a global workspace, whereas low-level stimuli can become conscious due to more posterior processing.info:eu-repo/semantics/nonPublishe
Is consciousness graded or dichotomous? a level of processing account
No full textIn this dissertation, we investigate whether consciousness is graded or dichotomous. Based on previous work and a level of processing framework, we hypothesize that consciousness in general, and visual experience specifically, can be conceived of as both graded and dichotomous. We present a series of experimental studies that provide support for this reasoning. We outline a set of future projects which can follow up on this research, and discuss the limitations of the current approach.Doctorat en Sciences Psychologiques et de l'éducationinfo:eu-repo/semantics/nonPublishe
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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