1,721,073 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
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
The relationship between serotonin, decision-making and mood
Get PDFThe serotonin (5-HT) system has been implicated in both depression and reward and punishment processing. This thesis presents data from four studies designed to better understand the role of serotonin in decision-making and mood. Following the general introduction and description of the main experimental methods, the first experimental chapter presents a study that examined the relationship between naturally-varying 5-HT1A receptor availability, measured using positron emission tomography, and decision-making in healthy volunteers. This study identified correlations between 5-HT1A receptor availability in the hippocampal complex and both impulsivity and sensitivity to the probability of an outcome during decision-making. The second experimental chapter examined decision-making in healthy volunteers 3 days following MDMA (3,4-methylenedioxymethamphetamine) administration, when serotonin transmission is thought to be reduced. A specific type of decision-making process, “pruning” (the reflexive avoidance of aversive outcomes when searching through a tree of potential decisions), was significantly attenuated 3 days following MDMA administration. However, the expected positive relationship between the attenuation in this decision-making process and low mood was not observed. The third experimental chapter attempted to extend this finding using the acute tryptophan depletion method, which removes tryptophan (the precursor to serotonin) from the diet and is thought to reduce serotonin synthesis. Performance on three decision making tasks (pruning, gambling and impulsivity) was examined in healthy volunteers following tryptophan depletion. Results revealed that treatment decreased participants’ choosing of high probability gambles. The final chapter examined pruning in unmedicated depressed patients, and found that they behaved very similarly to healthy volunteers when evaluating aversive outcomes in the context of a tree of potential decisions, despite the hypothesised disruption to the serotonin system in this disorder. These experiments provide a more complete understanding of the relationship between serotonin, decision-making and mood, and are discussed in relation to theories of depression that pose a central role for disrupted decision-making
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
Neural and Behavioural Correlates of Empathy and Morality and their Associations with Psychopathic Traits
Get PDFPsychopathy is a personality disorder that can be defined by profound disturbances in empathic response to others and repeated engagement in immoral behaviour. This thesis set out to investigate how individual differences in psychopathic traits in the general population are associated with variability in distinct components of empathy and morality. This thesis endeavoured to answer five outstanding research questions: 1) Given the complexity and multidimensionality of empathy and morality constructs, which components of these constructs are associated with psychopathic traits at the behavioural level? [Chapters 2-3] 2) Are behavioural correlates of empathy and morality in psychopathic traits specific to affective-interpersonal traits/lifestyle-antisocial traits, or common to both? [Cs. 2-3] 3) Are these correlates consistent across genders? [Cs. 2-3] 4) Are associations between psychopathic traits and empathic [C. 4] and 5) moral processing reflected at the neural level [C. 5]? This thesis’ findings suggest that: 1) individual differences in psychopathic traits are associated with lesser empathic response to emotional stimuli, lesser propensity to feel moral emotions and atypical moral decision-making; 2) empathic atypicalities are driven by the joint variance between affective-interpersonal and lifestyle-antisocial facets, but those related to affective aspects of moral cognition seem to be driven by variance in affective-interpersonal traits; 3) empathic and moral atypicalities seem to be similar in men and women; 4) atypical amygdala and anterior insula function may represent neural markers of disrupted empathic processing for individuals with high levels of psychopathic traits; and 5) atypical functioning of the vmPFC/mOFC during moral processing may contribute to the disordered lifestyle and antisocial behaviour exhibited by individuals with high levels of psychopathic traits. These findings contribute to a more comprehensive understanding of the empathic and moral processing impairments that underlie psychopathic traits
The interaction between emotion and economic decision-making
Get PDFEmotions play an important role in daily life decisions. For example, we are likely to choose, judge, or evaluate things around us in different ways depending on whether we are feeling sad, anxious, or happy. Emotional reactions to life events and outcomes, such as winning an award, or getting a divorce, should also predict individuals’ subsequent decisions. However, the mechanisms by which such interactions between emotions and decisions unfold are still poorly understood. The aim of this thesis was two-fold: first, to characterize a computational model of how emotions are integrated into decisions; second, to provide a better understanding of the cognitive and neural mechanisms by which manipulating emotions can alter decisions. Following the general introduction and methods description, the first experimental chapter shows that integrating emotions (self-report feelings) in a computational model of decision-making could reliably predict people’s gambling choices, indicating a unique contribution of feelings to decisions. The second experimental chapter explores the influence of incidental emotional priming on gambling choice and the underlying neural mechanisms, using functional magnetic resonance imaging (fMRI). The findings suggest that how external emotions impact decisions, at both behavioural and neural levels, varied with individual differences in levels of trait anxiety. The third experimental chapter attempts to extend this finding by testing how risky decisions are altered in patients with clinical anxiety, relative to healthy controls; demonstrating a dissociation between sensitivity to risk, which was enhanced in anxiety, and sensitivity to monetary losses, which was not associated with anxiety. This thesis provides a more complete understanding of the complex interactions between emotions, mood and decision-making. In the final chapter the findings are discussed in light of influential theories in cognitive neuroscience and behavioural economics that posit a central role for emotions in determining the choices we make
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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