1,721,013 research outputs found
Replication Data for: Data base of Validation and Analysis of the metric Properties of the Leadership Questionnaire
No full textThe leadership and personal competencies exhibits limitations in terms of construct definition, behavior specifications and valid theory-based measuring strategies. An explanatory design with latent variables and the statistical software SAS 9.4 were used for the validation and adaptation to Spanish of the Leadership Virtues Questionnaire applied to work and organizational psychologists and people who exercise leadership functions in Chile. The levels of agreement between judges for the adaptation to the Spanish language and the confirmatory factor analysis of first order with four dimensions shows insufficient statistical indices for the absolute, comparative and parsimonious adjustments. However, a second-order confirmatory factor analysis with two dimensions presents a satisfactory fit for the item, model, and parameter matrices. The measurement of Virtuous Leadership would provide relevant inputs for further evaluation and training based on ethical competencies aimed at improving management, which would, in turn, allow for its treatment as an independent variable to generate an ethical organizational culture
Una evaluación empírica de procedimientos alternativos de análisis en diseños de medidas repetidas
No full textEl propósito de la tesis doctoral ha sido evaluar la potencia y robustez de una serie de nuevos procedimientos para analizar datos en diseños de medidas repetidas mediante tres experimentos de simulación Montecarlo. En primer experimento consistió en estudiar la robustez, para lo cual se manipularon las cuatro variables siguientes: tamaño de la muestra, estructura de matrices de dispersión, relación entre el tamaño de los grupos y el de las matrices de dispersión y la forma de la distribución. En el segundo experimento se estudió la potencia, para lo cual, además de las cuatro variables anteriores, también se manipularon el tamaño del coeficiente de variación muestral y el patrón de configuración de medidas. En el tercer experimento, se estudió la selección de estructuras de varianza que subyace a los datos, para lo cual, se utilizó el criterio de selección de Akaike. Palabras claves: estimación robusta, potencia, estructura de covarianza y criterio de selección de Akaike
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
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
Comparación de la potencia de nuevos enfoques para analizar datos de medidas repetidas
Full text linkPower comparison of new tests to analyze repeated measures data. This work compares the sensitivity of five modern analytical techniques for detecting the effects of a design with measures which are partially repeated when the assumptions of the traditional ANOVA approach are not met, namely: the approach of the mixed model adjusted by means of the SAS Proc Mixed module, the Bootstrap-F approach, the Brown-Forsythe multivariate approach, the Welch-James multivariate approach and Welch-James multivariate approach with robust estimators. Previously, Livacic-Rojas, Vallejo and Fernández found out that these methods are comparable in terms of their Type I error rates. The results obtained suggest that the mixed model approach, as well as the Brown-Forsythe and Welch-James approaches, satisfactorily controlled the Type II error rates corresponding to the main effects of the measurement occasions under most of the conditions assessed.Este trabajo compara la sensibilidad de cinco modernas técnicas analíticas para detectar los efectos de un diseño de medidas parcialmente repetidas cuando se incumplen los supuestos del tradicional enfoque ANOVA, a saber: el enfoque del modelo mixto ajustado mediante el módulo Proc Mixed del SAS, el enfoque Boostrap-F, el enfoque multivariado de Brown-Forsythe, el enfoque multivariado de WelchJames y el enfoque multivariado de Welch-James con estimadores robustos. Con anterioridad, Livacic-Rojas, Vallejo y Fernández habían descubierto que los métodos examinados aquí eran comparables en términos de sus tasas de error Tipo I. Los resultados obtenidos sugieren que tanto el enfoque del modelo mixto como los enfoques de Brown-Forsythe y Welch-James controlaban satisfactoriamente las tasas de error de Tipo II correspondientes a los efectos principales de las ocasiones de medida bajo la mayoría de las condiciones evaluadas
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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