1,721,115 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
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
The Chronic Pain Acceptance Questionnaire: Preliminary evidence for the predictive validity of patients’ subgroups
No full textThis study explored whether Activity Engagement (AE) and Pain Willingness (PW) - as measured by the Chronic Pain Acceptance Questionnaire (CPAQ) - are useful to identify, beyond potential confounders, significant subgroups of patients with chronic pain. We also explored the validity of AE and PW processes, as well as the interaction between them, to longitudinally predict adjustment. A total of 133 patients with chronic pain participated in the study at Time 1 (T1), and 32 patients returned 12 months later (T2) for assessment. The participants completed at T1 and T2 the CPAQ and measures of depression, anxiety, pain-related anxiety, psychological well-being (PWB), and disability. In line with previous research, cluster analyses revealed three subgroups of patients on the basis of CPAQ scores, which significantly differed one other on adjustment, even when potential confounders were controlled. Furthermore, lower AE scores at T1 significantly predicted lower PWB and higher disability and pain-related anxiety at T2, beyond outcome measures at T1. Relations of disengagement with poorer PWB and disability were stronger when PW was low at T1. The findings support the predictive validity of the CPAQ and provide further evidence supporting the benefits of AE and PW (as a whole) on pain adjustment
Application of the Double Monotonicity Model to Polytomous Items. Scalability of the Beck Depression Items on subjects with eating disorders
No full textThis paper investigates the item scalability of the Beck Depression Inventory (BDI) in 252 subjects; 126 with and 126
without eating disorders. To do so, an order was established regarding the BDI items according to the clinical characteristics of
the subjects with eating disorders. The nonparametric Item Response Theory (NIRT) model was applied to evaluate Monotone
Homogeneity and Double Monotonicity of items, as well as the reliability of the scale in both groups. The results show that the
order of the items is satisfied in the group with eating disorders, but not in the control group. Therefore, the results obtained allow
the ordering of depression scores of subjects with eating disorders according to their clinical characteristics. This order is not
valid for the depression scores of subjects who did not have eating disorders. It should be noted that the application of the Double
Monotonicity model to polytomous items provides new and relevant information when compared to the data provided by the
Classical Test Model. In addition, it is very useful for other items and subjects having certain characteristics
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
Obtaining Equations from the Proportional Odds Model to Set Multiple Cut Scores on a Test
No full textFrom the proportional odds (PO) model, we obtain general equations to compute multiple cut scores on a test score. This analytical
procedure is based on the relationship between a test score (X) and an ordinal outcome variable (Y) with more than two categories. Cut scores are
established at the test scores corresponding to the intersection of adjacent category distributions. The application of this procedure is illustrated by
an example with data from an actual study on eating disorders (EDs). In this example, two cut scores on the Eating Attitudes Test (EAT-26) are
established in order to differentiate between three ordered categories: (1) asymptomatic, (2) symptomatic, and (3) eating disorder. Diagnoses were
made from the responses to a self-report (Q-EDD) that operationalizes DSM-IV criteria for EDs. Alternatives to the PO model, when the PO
assumption is rejected, are discussed
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