1,720,998 research outputs found
Does fear expectancy prime fear? An autonomic study in spider phobics
No full textThis study investigated whether fear expectancy in phobic individuals induces priming of the defensive system, thus generating a “blind” phobic response even to non phobic stimuli. We employed a paradigm in which two different visual cues signalled the upcoming picture presentation of either a spider or an innocuous animal (congruent condition). Unknown to the participants, the visual cue was incorrectly followed by a picture from the opposite category on two additional trials (incongruent condition). Cardiac and skin conductance responses were recorded from young adults with (n=15) or without (n= 14) spider phobia during both the expectation and exposure of these pictures in the congruent and incongruent conditions. In the congruent condition, the autonomic responses during expectation matched the responses during exposure. In particular, non-phobic controls showed an orienting response (bradycardia and moderate skin conductance increase) to both picture categories, while spider phobics an orienting response to the innocuous animals and a defence response (tachycardia and marked skin conductance increase) to spiders.
In the incongruent condition, the autonomic responses during exposure were driven by the affective content of the pictures, and their amplitude was greater than in the congruent condition, likely due to the signal-stimulus discrepancy. In particular, the response to the innocuous picture of phobic participants expecting a spider did not shift in the direction of the defence response.
Thus, spider phobics did not show priming of the defensive system but maintained discrimination between phobic and innocuous stimuli. Finally, the greatly amplified response to the incorrectly signaled spider in phobics suggests a discrepancy-phobia interaction
Reseña bibliográfica: D’Alessandro, L., Labrador Arroyo, F. y Rossi, P. (a cura di) (2014). Siti Reali in Europa. Una storia del territorio tra Madrid e Napoli. Napoli: Università degli Studi Suor Orsola Benincasa. 281 pp.
Full text linkReseña bibliográfica: D’Alessandro, L., Labrador Arroyo, F. y Rossi, P. (a cura di) (2014). Siti Reali in Europa. Una storia del territorio tra Madrid e Napoli. Napoli: Università degli Studi Suor Orsola Benincasa. 281 pp.</p
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
Geomorphological and neotectonic evolution of the Umbria-Marche Ridge, northern sector.
No full textThe sequence of erosional surfaces and alluvial terraces there present points out the foundamental role played by regional uplift which starting from the Upper Pliocene, after the end of the main tectogenetic phase, involved the area. The genesis of alluvial deposits is referred to Plaistocene when, as a consequence of cold climates, debris material coming for bare slope overcharged rivers. They were subsequently incided by linear erosion, favored by climatic amelioration and vegetal covering of slopes which reduced debris production. Both the erosions surfaces and the older alluvial were variously displaced by recent tectonics which strongly affected also setting and evolution of drainage networks
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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