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161.
The comparative format used in ranking and paired comparisons tasks can significantly reduce the impact of uniform response biases typically associated with rating scales. Thurstone's (1927, 1931) model provides a powerful framework for modeling comparative data such as paired comparisons and rankings. Although Thurstonian models are generally presented as scaling models, that is, stimuli-centered models, they can also be used as person-centered models. In this article, we discuss how Thurstone's model for comparative data can be formulated as item response theory models so that respondents' scores on underlying dimensions can be estimated. Item parameters and latent trait scores can be readily estimated using a widely used statistical modeling program. Simulation studies show that item characteristic curves can be accurately estimated with as few as 200 observations and that latent trait scores can be recovered to a high precision. Empirical examples are given to illustrate how the model may be applied in practice and to recommend guidelines for designing ranking and paired comparisons tasks in the future. 相似文献
162.
When an item response theory model fails to fit adequately, the items for which the model provides a good fit and those for which it does not must be determined. To this end, we compare the performance of several fit statistics for item pairs with known asymptotic distributions under maximum likelihood estimation of the item parameters: (a) a mean and variance adjustment to bivariate Pearson's X2, (b) a bivariate subtable analog to Reiser's (1996) overall goodness-of-fit test, (c) a z statistic for the bivariate residual cross product, and (d) Maydeu-Olivares and Joe's (2006) M2 statistic applied to bivariate subtables. The unadjusted Pearson's X2 with heuristically determined degrees of freedom is also included in the comparison. For binary and ordinal data, our simulation results suggest that the z statistic has the best Type I error and power behavior among all the statistics under investigation when the observed information matrix is used in its computation. However, if one has to use the cross-product information, the mean and variance adjusted X2 is recommended. We illustrate the use of pairwise fit statistics in 2 real-data examples and discuss possible extensions of the current research in various directions. 相似文献
163.
Simona Ghedin Alberto Semi Luca Caldironi Cristina Marogna Francesco Piccione 《The American journal of family therapy》2013,41(1):15-26
ABSTRACTThis research wants to verify the effectiveness of couple's treatment, when a neurodegenerative disease affects one of the two partners. The disease affects not only the ailing individual, but also the dynamics within the couple. Fourteen patients affected by neurodegenerative diseases participated in an emotionally focused couple therapy (EFT) with their spouses. We collected a measure of the quality of life (SF-36) and relationship satisfaction (DAS) at the beginning and at the end of the treatment for both partners. The results show an improvement in quality of life and couple contentment, underlining the usefulness of such a psychotherapeutic intervention on the couple. 相似文献
164.
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166.
Nuovo Soggettario is a verbal subject indexing system renewing the existing Soggettario used in many Italian libraries. The
renewal work consists of substantive improvements in the structure and the relationships of the system, now making it a true
faceted thesaurus. Facet analysis is a key part of this development, both in identifying a set of facets and categories to
which terms in the thesaurus belong, and in providing a scheme of the roles they can play within a subject string, as well
as rules for their citation order. 相似文献
167.
Can tactile stimuli be subitised? An unresolved controversy within the literature on numerosity judgments 总被引:1,自引:0,他引:1
There is a growing interest in the question whether the phenomenon of subitising (fast and accurate detection of fewer than 4-5 stimuli presented simultaneously), widely thought to affect numerosity judgments in vision, can also affect the processing of tactile stimuli. In a recent study, in which multiple tactile stimuli were simultaneously presented across the body surface, Gallace et al (2006 Perception 35 247-266) concluded that tactile stimuli cannot be subitised. By contrast, Riggs et al (2006 Psychological Science 17 271 275), who presented tactile stimuli to participants' fingertips, came to precisely the opposite conclusion, arguing instead that subitising does occur in touch. Here, we re-analyse the data from both studies using more powerful statistical procedures. We show that Riggs et al's error data do not offer strong support for the subitising account and, what is more, Gallace et al's data are not entirely compatible with a linear model account of numerosity judgments in humans either. We then report an experiment in which we compare numerosity judgments for stimuli presented on the fingertips with those for stimuli presented on the rest of the body surface. The results show no major differences between the fingers and the rest of the body, and an absence of subitising in either condition. On the basis of these observations, we discuss whether the purported existence of subitisation in touch reflects a genuine cognitive phenomenon, or whether, instead, it may reflect a bias in the interpretation of the particular psychometric functions that happen to have been chosen by researchers to fit their data. 相似文献
168.
Costa A Peppe A Brusa L Caltagirone C Gatto I Carlesimo GA 《Behavioural neurology》2008,19(1-2):45-48
Growing interest is present in literature on the study of prospective memory functioning in Parkinson's disease (PD). Current data indicate that prospective memory may be impaired in PD and a relationship with general executive dysfunctioning has been suggested. However, although the dopamine dependency of cognitive dysfunction in PD has been widely investigated, poor is known on the dopaminergic modulation of PM. In the present study we explored the effect of acute administration of levodopa on the performance of a PD sample (n=20) in a time-based prospective memory task. PD patients were evaluated in the morning after a 12-hour therapy wash-out in two experimental conditions: i) after levodopa assumption ("on"); ii) without drug administration ("off"). The experimental task required to execute three uncorrelated actions after 10' for three consecutive trials. Distinct scores for the spontaneous recall of the intention to perform the actions (prospective component) and for the correct execution of the actions (retrospective component) have been computed. Results showed that in the "off" condition PD patients were selectively impaired on the prospective component of the task. However, L-dopa administration significantly improved PD patients' performance actually restoring the prospective memory deficit. These results support a critical role of dopaminergic modulation in prospective memory processes in PD patients, possibly through the replacement of dopamine levels in fronto-striatal pathways. 相似文献
169.
Carlos Alberto Sanchez 《Continental Philosophy Review》2008,41(4):441-461
“Exiled” Spanish philosopher José Gaos was the first to translate, in its entirety, Martin Heidegger’s Sein und Zeit. Emilio Uranga, a student of Gaos in Mexico City (exiled since 1938), appropriates Heidegger’s ontological hermeneutics in
an effort to expose the historico-existential structures making up “lo mexicano,” or Mexicanness. Uranga’s Análisis del ser del mexicano (1952) freely and creatively employs the methods of existential analysis, suggesting that the being-there of the Mexican
being is ontologically “insufficient” and “accidental”—modes of being reflected in existential expressions of sentimentality,
indifference, and angst particular to this form of life. As a work indebted to Heidegger’s Sein und Zeit, Analysis of the Being of the Mexican fails to be faithful to this method. This, however, is the source of its value. The purpose of this paper is two-fold: one,
to introduce the Anglo–American philosophical readership to Uranga’s existential phenomenology; and, two, to disentangle the
lines of thought that make up Uranga’s Análisis and in the process defend Uranga from the possible charge that he ignorantly misappropriates Heidegger’s method.
相似文献
Carlos Alberto SanchezEmail: |
170.
Alberto Voltolini 《Erkenntnis》2004,61(1):75-98
There are two interpretations of what it means for a singular term to be referentially direct, one truth-conditional and the other cognitive. It has been argued that on the former interpretation, both proper names and indexicals refer directly, whereas on the latter only proper names are directly referential. However, these interpretations in fact apply to the same singular terms. This paper argues that, if conceived in purely normative terms, the linguistic meaning of indexicals can no longer be held to make these terms referentially indirect under the second interpretation. This result is then generalized to proper names, by ascribing them a normative meaning as well. 相似文献