1,721,026 research outputs found
A comparison of the eigenvalue method and the geometric mean procedure for ratio scaling
No full textThis article evaluates and compares the performance
of two ratio scaling methods, the eigenvalue method
proposed by Saaty (1977, 1980) and the geometric
mean procedure advocated by Williams and Crawford
(1980), given random data. The two methods were examined
in a series of monte carlo simulations for two
response methods (direct estimation and constant sum)
and various numbers of stimuli and response scales.
The sampling distributions of the measures of consistency
of the two methods were tabulated, rules for detecting
and rejecting inconsistent respondents are outlined,
and approximation formulas for other designs
are derived. Overall, there was a high level of agreement
and correspondence between the results from the
two scaling techniques even when the data were random.Budescu, David V.; Zwick, Rami; Rapoport, Amnon. (1986). A comparison of the eigenvalue method and the geometric mean procedure for ratio scaling. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/102274
Cognitive Hierarchy: A Limited Thinking Theory in Games
No full textStrategic thinking, best-response, and mutual consistency (equilibrium) are three key
modeling principles in non-cooperative game theory. Camerer, Ho and Chong (2004)
relax mutual consistency to predict how players are likely to behave in one-shot
games before they can learn to equilibrate. They introduce a one-parameter cognitive
hierarchy (CH) model to predict behavior in one-shot games, and initial conditions
in repeated games. The CH approach assumes that players use k steps of reasoning
with frequency f(k). Camerer, Ho and Chong (2004) assume f(k) to be a one-parameter
Poisson distribution.
This paper investigates and lends support to the generality and precision of this
Poisson CH model in three ways: 1. an unconstrained general distribution CH model
is found to offer only marginal improvement in fit over its Poisson cousin and hence
this suggests that the Poisson approximation is reasonable; 2. the steps of thinking
players used in games are found to correlate with response time and schools they
attend which suggests that cognitive hierarchy captures realistically a reasoning
mechanism that goes on in the brain of these players; and 3. several classes of
interesting economic problems, including asset pricing and business entry can be
explained by the iterated reasoning of the Poisson CH model. When compared to the
Quantal Response Equilibrium model which relaxes the best-response assumption of
equilibrium theory, the better fit of Poisson CH model seem to suggest that mutual
consistency is a more plausible assumption to relax in explaining deviation from
equilibrium theory
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
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
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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