1,720,967 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
Psychogenic Nonepileptic Seizures in Women
No full textAbstractPsychogenic nonepileptic seizures (PNES) are the most common type of functional neurological symptom disorders and are frequently diagnosed in tertiary care epilepsy monitoring units. These are associated with significant decline in social functioning and quality of life. The majority of patients with PNES are women, outnumbering men by a ratio of 3:1. Female sex preponderance occurs after puberty and usually before the age of 55 years. Many of the psychiatric risk factors in PNES (depression, anxiety, history of traumatic experiences, other somatic symptom disorders) are more common in women and may partially account for the difference in sex prevalence. Neurobiological and neurohumoral mechanisms may also play a role, but our understanding is limited at this point. In this review, we present information on epidemiology and risk factors, neurobiological and psychological mechanisms, clinical approach to diagnosis, evidence-based treatment, and long-term outcomes. We highlight findings related to differences between women and men in PNES. Most of these data are not decisive and require further corroboration. While the disorder may be more frequently suspected in women, all patients with suspected PNES deserve an objective and thorough investigation of their symptoms. Early and accurate identification of this disorder should be a priority, especially as evidence-based treatments, which may lead to improved outcomes, are increasingly available.</jats:p
Psychogenic non-epileptic seizures: A model of their pathogenic mechanism
No full textAbstractPsychogenic non-epileptic seizures (PNES) consist of paroxystic events facilitated by a dysfunction in emotion processing. Models explaining the pathogenic mechanisms leading to these seizure-like episodes are limited. In this article, evidence that supports dysfunction at the level of arousal tolerance, cognitive-emotional information processing and volitional control is reviewed. A hypothetical pathophysiological mechanism is discussed based on functional neuroimaging evidence from PNES-related conditions and traits. This pathophysiological model suggests an alteration in the influence and connection of brain areas involved in emotion processing onto other brain areas responsible for sensorimotor and cognitive processes. Integrating this information, PNES are conceptualized as brief episodes facilitated by an unstable cognitive-emotional attention system. During the episodes, sensorimotor and cognitive processes are modified or not properly integrated, allowing the deployment of autonomous prewired behavioral tendencies. Finally, I elaborate on how therapeutic applications could be modified based on the proposed hypothetical model, potentially improving clinical outcomes
Readiness to Start Treatment and Obstacles to Adherence
No full textEffective evidence-based psychotherapeutic regimens for psychogenic nonepileptic seizures (PNES) are available, but several obstacles still contribute to poor adherence to treatment. This chapter reviews the three stages at which patient dropout tends to occur in clinical practice and in studies. Patient-related, provider-related, and systemic causes of nonadherence are reviewed. Patient-related factors include a failure to accept or understand the diagnosis, psychiatric comorbidities, and ambivalence about change. Provider-related and systemic factors include a shortage of behavioral health specialists, gaps in care between neurologists and mental health providers, a lack of familiarity with the disorder, and stigmatization of patients. The chapter concludes with a review of potential interventions to address obstacles to treatment, including an integrated treatment team with joint presentation of the diagnosis, rapid and streamlined transition into psychotherapy, motivational interviewing, and engagement of patients’ family members and support systems.</p
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
Case Report: Brief Mindfulness-Based Psychotherapeutic Intervention During Inpatient Hospitalization in a Patient With Conversion and Dissociation
No full text Conversion and dissociative disorders have psychopathological mechanisms in common and can simultaneously be present in the same patient. Evidence-based treatments for conversion and dissociative disorders are limited and mostly focused on cognitive-behavioral therapies (CBT) for a few conversion disorders. Avoidance and difficulties in emotion expression are thought to explain conversion and hence, mindfulness-based therapies (MBTs) could hypothetically constitute a beneficial intervention. Here, we present the case of Anne, a 31-year-old female with a long-term history of depression, anxiety, and psychogenic nonepileptic seizures (PNES). While facing health-related and marital stressors, Anne acutely developed conversion left-sided paralysis, psychogenic bilateral tremor, and dissociative amnesia and had an increase in PNES frequency. Some of these newly developed symptoms resolved and other improved significantly after an acceptance and commitment therapy (ACT) intervention was offered during a brief inpatient hospitalization. This constitutes the first report of an ACT-based intervention used in this type of clinical syndromes. </jats:p
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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