1,721,360 research outputs found
Rand R. Wilcox's Quick Files
No full textThe Quick Files feature was discontinued and it’s files were migrated into this Project on March 11, 2022. The file URL’s will still resolve properly, and the Quick Files logs are available in the Project’s Recent Activity
How do examinees behave when taking multiple-choice tests?
No full textWilcox, Rand R.. (1983). How do examinees behave when taking multiple-choice tests?. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/101681
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
A Cautionary Note on Estimating the Reliability of a Mastery Test with the Beta-Binomial Model
No full textBased on recently published papers, it might be
tempting to routinely apply the beta-binomial
model to obtain a single administration estimate of
the reliability of a mastery test. Using real data, the
paper illustrates two practical problems with estimating
reliability in this manner. The first is that
the model might give a poor fit to data, which can
seriously affect the reliability estimate, and the second
is that inadmissible estimates of the parameters
in the beta-binomial model might be obtained.
Two possible solutions are described and illustrated.Wilcox, Rand R.. (1981). A Cautionary Note on Estimating the Reliability of a Mastery Test with the Beta-Binomial Model. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/100425
A note on decision theoretic coefficients for tests
No full textRecently it was suggested that the Bayes risk
might be used to characterize tests. To conform to
common practices about indexes, a rescaling of the
Bayes risk was proposed. The motivation for this
new coefficient, d, was to provide an index that has
a large value when the Bayes risk is small and that
has a value in the closed interval [0, 1]. However,
since d might have a value outside this range, a
modification of d is described which yields an index
that always has a value between zero and one.Wilcox, Rand R.. (1978). A note on decision theoretic coefficients for tests. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/99458
Estimating the validity of a multiple-choice test item having k correct alternatives
No full textIn various situations, a multiple-choice test item
may have more than one correct alternative, and the
goal is to determine how many correct alternatives an
examinee actually knows. For a randomly sampled examinee,
the validity of an item is defined as the probability
of deciding that the examinee knows i correct
alternatives, when in fact exactly i correct alternatives
are known. This article describes how latent class
models can be used to estimate this probability.Wilcox, Rand R.. (1985). Estimating the validity of a multiple-choice test item having k correct alternatives. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/102187
An approach to measuring the achievement or proficiency of an examinee
No full textVarious school systems are developing proficiency
tests which are conceptualized as representing a
variety of skills with one or more items per skill.
This paper discusses how certain recent technical
advances might be extended to examine these tests.
In contrast to previous analyses, errors at the item
level are included; and it is shown that inclusion of
these errors implies that a substantially longer test
might be needed. One approach to this problem is
described, and directions for future research are
suggested.Wilcox, Rand R.. (1980). An approach to measuring the achievement or proficiency of an examinee. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/100093
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
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