1,720,962 research outputs found
Does colour undergo the same reversed contrast effect observed for lightness in Agostini and Galmonte's Necker cube display?
No full textAgostini and Galmonte (1997 Perception 26 Supplement, 27; 2002 Perception 31 Supplement, 7) presented a reversed-contrast display where a grey region surrounded by a black area appears darker than an identical grey region surrounded by white. Both higher- and lower-level factors affect simultaneously this configuration, but higher-level grouping factors prevail in determining the effect, that cannot be explained by assimilation. The present work investigates whether global grouping factors induction can be found also for colour. Agostini and Galmonte's display was reproduced by using red/yellow inducing colours (backgrounds/corners), whereas induced regions (dashed lines) were orange. There were also two control conditions: (i) inducer corners were the same orange as targets; (ii) disks having same area and colour (red/yellow) replaced the inducer corners. In these cases, we did not expect any effect. Observers had to judge the colour of the induced regions on a red/yellow Munsell Scale. Results replicate those obtained for lightness: Global factors determine the target perceived colour; ie, orange appeared reddish in the yellow corners/red background display, whilst it was perceived yellowish in the opposite configuration. No statistically significant difference was found for both controls. Therefore, we conclude that global induction overcomes local induction also for coloured displays.
[Supported by MIURGrant2007E7PHM3.
Automatic spatial association for luminance
No full textIn the present study, we investigated whether luminance
and the side of response execution are associated,
showing a SNARC-like effect (faster responses with the left
hand for dark stimuli, and vice versa for light stimuli).
A total of 30 participants were tested in two experiments. In
Experiment 1, the association between space and the luminance
of chromatic stimuli was directly tested (brightness
discrimination). In Experiment 2, the same spatial association
was tested indirectly (hue discrimination). The results showed
that participants responded faster with their left hand to hues
with lower luminance, and with their right hand to hues with
higher luminance, in either the direct or the indirect task. The
consistency of this association in both tasks demonstrates the
automaticity of the SNARC-like effect for luminance
Verbal and Cross-Modal Ratings of Music: Validation and Application of an Icon-Based Rating Scale
Full text linkCan music be rated consistently using nonverbal descriptors such as colours and temperatures? 144 participants rated 6 experimenter-selected and 2 self-selected pieces of music along 15 bipolar icon (graphic) scales intended to portray emotions, and sensory experiences consisting of colour, temperature, shape, speed, texture, and weight. Participants also rated the same pieces using bipolar verbal scales which aimed to encompass the concepts represented by the icons (e.g., the word ‘‘red’’ for the colour red). Furthermore, the icons themselves were subjected to open-ended verbal labelling to validate the icon scale. Colour icons spontaneously evoked a cross-modal association on 67% of occasions: blue being cool, and red/orange being warm or hot, and the icon scale had overall good face validity. Music regularly and consistently evoked multisensory associations (using the icon scale) including shapes, colours, weight, and temperatures, in addition to emotions. Cross-modal perception is indicative of music’s character rather than the enjoyment of the music. The icon scale provides new insights into music perception and for applications where language skill may limit participant expression
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
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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