177,012 research outputs found
Emotional visual stimuli affect the evaluation of tactile stimuli presented on the arms but not the related electrodermal responses
No full textConsidering the wealth of recent studies on affective touch, to date, little research addressed the role of the other sensory modalities in the modulation of hedonic tactile perception. Here, we investigated the behavioral and electrodermal signature of the interaction between simultaneously presented visual and tactile stimuli. In three experiments, participants were presented with emotional pictures (international affective picture system; IAPS), while their forearm was gently stroked by means of different tactile textures (i.e., sandpaper, satin, tinfoil, abrasive sponge, and skin-to-skin contact). In Experiment 1, the participants evaluated the pleasantness of the tactile stimulation received, while in Experiment 2 they evaluated the pictures emotional valence. In Experiment 3 the participants rated the pleasantness, the smoothness and the softness of the textures; skin conductance responses (SCRs) were also measured. In sum, the results revealed that while the visual valence ratings were not modulated by the tactile stimulation, the hedonic and sensory tactile ratings were modulated by the visual presentation of both positively and negatively valenced pictures, as well as by neutral pictures. The modulatory effects occurring during visuo-tactile interactions might thus be not necessarily reciprocal. Moreover, the SCRs were not differently affected by the visuo-tactile or tactile conditions of stimulus presentation, suggesting a dissociation between behavioral and electrodermal effects in multisensory interactions
Textures that we like to touch: An experimental study of aesthetic preferences for tactile stimuli.
No full textWe report two experiments designed to investigate the nature of aesthetic preferences for tactile textures in humans. In Experiment 1, the participants rated their preference for a range of actively and passively explored textures presented on their hands and on their cheeks. The results revealed that those textures that were subjectively-rated as smoother were preferred over those that were rated as rougher. Moreover, certain textures were disliked more during active than during passive stimulation. In Experiment 2, the speed of tactile stimulation was controlled in order to elicit vigorous responses from C-tactile fibers (present only in hairy skin), which are thought to play a central role in pleasant aspects of touch. The results revealed that textures were preferred when presented on the hairy skin of the forearm than on the glabrous palm of the hand. These results provide preliminary evidence regarding people's preferences for different attributes of tactile surface
The individual preferred velocity of stroking touch as a stable measurement
No full textAffective touch is of fundamental importance in human social interactions and there is an increasing interest in using touch as a probe for general affective perception. To this end, we developed a test of preferred velocity (ToP-V) of touch and tested whether the individually preferred stroking velocity is a stable and valid measurement. In study one, thirty healthy participants (18–30 years, 17 women) were examined with the ToP-V. Therefore, pairs of different slow stroking stimuli were presented by the Rotary Tactile Stimulator – a robotic device - on the forearm and the participants chose the velocity they preferred in a forced choice paradigm. A retest was conducted after about 12 days. In study two, twenty-two healthy participants (20–43 years, 11 women) were tested with a shorter version of the ToP-V on the forearm and also on the palm. Moreover, they rated the pleasantness and the intensity of the stroking stimulations on both body sites. Results suggest that humans possess an individual and stable preferred velocity of stroking touch (test-retest reliability r = 0.86) which can be tested in a standardized procedure. A shortened 5 min version of the ToP-V also exhibited reasonable test characteristics (split half reliability: r = 0.7; test-retest reliability r = 0.77). The ToP-V correlated well with the pleasantness ratings when tested on the forearm (r = 0.65), but not when tested on the palm (r = − 0.22), indicating that the ToP-V targets a C-tactile nerve fiber specific perception. Hence, the ToP-V can be used for reliably probing affective touch perception
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe 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
The Effect of the Tactile Attributes of a Container on Mineral Water Perception
No full textThe present study investigates the effect of container texture on people’s perception of four characteristics (i.e., freshness, pleasantness, level of carbonation, lightness) of mineral water (i.e., still or carbonated). Water was served in three commercial cups covered with a layer of sandpaper, satin, or the same material of the cup (plastic). The blindfolded participants were asked to evaluate the mineral water using visual analogue scales. The results showed that mineral water was perceived as fresher and more pleasant when contained in plastic cups than when it was contained in cups covered with sandpaper or satin. Moreover, mineral water was perceived as lighter when contained in plastic cups than when it was contained in cups covered with sandpaper. These results suggest that people’s perception of some characteristics of mineral water can be modulated by the texture of the container in which the liquid is served
"Closing the R&D Gap, Evaluating the Sources of R&D Spending"
No full textBoth spending and tax policies have been implemented in the United States with the goal of stimulating private sector research and development (R&D). Karier questions whether current R&D policy, especially the research and experimentation tax credit, can contribute to closing the gap between nondefense expenditures on R&D in the United States and such expenditures in other countries, such as Japan and Germany. He also explores possible changes to our current R&D policy to make it more effective.
The kandinsky experience: A multisensory augmented reality application for cultural heritage
No full textKandinsky-Experience Book is a multisensory Augmented Reality experience that involves sight, hearing and smell senses and aims at improving the users’ engagement in the Kandinsky’s artworks. Specifically, the aim of the application is to augment the experience of the user creating a journey throughout Kandinsky's work by using an AR application for smartphones integrated with audio and olfactory stimuli, in order to allow him/her to be more immersed in the piece of art. The research project has been inspired by the synesthetic approach of the abstract painter to the theory and the perception of art in his books. Starting from the artist’s considerations about the relationship between different sensorial stimuli in works of art, we decided to amplify some of his theories suggesting a connection between the main pictorial elements and some corresponding olfactory stimuli, grounding our hypotheses on the content of papers concerning the crossmodal synesthetic correspondences between olfactory stimuli and other sensorial modalities. Thanks to the simultaneous presentation of the specifically developed AR contents and the olfactory stimuli, the users’ feelings and emotions during the experience are amplified as a result of the sensory integration. Moreover, by using AR technology and olfactory devices to stimulate visual and olfactory perceptual channels we aimed at increasing the generation of longer-lasting memories in the users' mind
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Raising awareness about the consequences of human activities on natural environments through multisensory augmented reality: Amazon rainforest and coral reef interactive experiences
No full textCultural and educational institutions have been subjected to important changes in the approach they use to involve the public in the last years. For example, museums are more and more playing a pedagogical role, referring not only to exhibitions of pieces of art, but also to exhibitions concerning current topics in cultural and social affairs. Storytelling and interaction are two of the most popular methods used to make exhibitions more interesting for the visitors, and many works have demonstrated that Virtual Reality and Augmented Reality technologies can be effectively used to support these approaches in the context of museum exhibitions. This paper presents a research work aimed to design and develop an interactive multisensory AR application (based on sight, hearing, and olfaction senses), which can be used for improving the users' engagement in exhibitions and generate awareness about the dramatic outcomes of pollution on the environment. Specifically, the paper describes a case study of multisensory Augmented Reality interactive experiences concerning the negative effects of human activities on natural environments
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