scholarly journals Virtual Agents in Brain-Computer Interfaces

2015 ◽  
Vol 15 (1) ◽  
pp. 48-60 ◽  
Author(s):  
Marc Cavazza ◽  
Fred Charles ◽  
Stephen W. Gilroy ◽  
Julie Porteous ◽  
Gabor Aranyi ◽  
...  
Keyword(s):  
Virtual Worlds ◽  
Potential Role ◽  
Affective State ◽  
Regulation System ◽  
Virtual Agents ◽  
Interactive Narrative ◽  
Brain Computer Interfaces ◽  
Specific Context ◽  
Computer Interfaces

The recent development of Brain-Computer Interfaces (BCI) for Virtual Worlds has resulted in a growing interest in realistic visual feedback. In this paper, we investigate the potential role of Virtual Agents in neurofeedback (NF) systems, which constitute an important paradigm for BCI. We discuss the potential of virtual agents to contribute to the success of NF in the specific context of affective BCI. Throughout the paper, we illustrate our presentation with two fully implemented NF prototypes featuring virtual agents. The first is an interactive narrative in which the user empathises with the feature character; the second, an emotion regulation system in which virtual crowd behaviour becomes a metaphor for arousal, as the user attempts to down-regulate their affective state.

On the role of cost-sensitive learning in multi-class brain-computer interfaces

2010 ◽  
Vol 55 (3) ◽  
pp. 163-172 ◽  
Author(s):  
Dieter Devlaminck ◽  
Willem Waegeman ◽  
Bart Wyns ◽  
Georges Otte ◽  
Patrick Santens
Keyword(s):  
Brain Computer Interfaces ◽  
Cost Sensitive Learning ◽  
Computer Interfaces

Artistic brain-computer interfaces: the expression and stimulation of the user’s affective state

2015 ◽  
Vol 2 (2-3) ◽  
pp. 60-69 ◽  
Author(s):  
Marvin Andujar ◽  
Chris S. Crawford ◽  
Anton Nijholt ◽  
France Jackson ◽  
Juan E. Gilbert
Keyword(s):  
Affective State ◽  
Brain Computer Interfaces ◽  
Computer Interfaces ◽  
Stimulation Of

scholarly journals The Effectiveness of Embodied Pedagogical Agents and Their Impact on Students Learning in Virtual Worlds

2020 ◽  
Vol 10 (5) ◽  
pp. 1739
Author(s):  
Foteini Grivokostopoulou ◽  
Konstantinos Kovas ◽  
Isidoros Perikos
Keyword(s):  
Virtual Worlds ◽  
Learning Experience ◽  
Virtual Learning ◽  
Pedagogical Agents ◽  
Virtual Agents ◽  
Learning Approaches ◽  
3D Virtual Worlds ◽  
Proper Design ◽  
And Performance

Over the last years, the successful integration of virtual reality in distance education contexts has led to the development of various frameworks related to the virtual learning approaches. 3D virtual worlds are an integral part of the landscape of education and demonstrate novel learning possibilities that can open new directions in education. An important aspect of virtual worlds relates to the intelligent, embodied pedagogical agents that are employed to enhance the interaction with students and improve their overall learning experience. The proper design and integration of embodied pedagogical agents in virtual learning environments are highly desirable. Although virtual agents constitute a vital part of virtual environments, their exact impact needs are yet to be addressed and assessed. The aim of the present study is to thoroughly examine and deeply understand the effect that embodied pedagogical agents have on the learning experience of students as well as on their performance. We examine how students perceive the role of pedagogical agents as learning companions during specific game-based activities and the effect that their assistance has on students’ learning. A concrete experimental study was conducted in AVARES, a 3D virtual world educational environment that teaches the domain of environmental engineering and energy generation. The results of the study point out that embodied pedagogical agents can improve students’ learning experience, enhance their engagement with learning activities and, most of all, improve their knowledge construction and performance.

scholarly journals Brain–Computer Interfaces: Lessons to Be Learned from the Ethics of Algorithms

2018 ◽  
Vol 27 (4) ◽  
pp. 635-646 ◽  
Author(s):  
ANDREAS WOLKENSTEIN ◽  
RALF J. JOX ◽  
ORSOLYA FRIEDRICH
Keyword(s):  
Brain Computer Interfaces ◽  
Ethical Assessment ◽  
Computer Interfaces ◽  
Ethical Role

Abstract:Brain–computer interfaces (BCIs) are driven essentially by algorithms; however, the ethical role of such algorithms has so far been neglected in the ethical assessment of BCIs. The goal of this article is therefore twofold: First, it aims to offer insights into whether (and how) the problems related to the ethics of BCIs (e.g., responsibility) can be better grasped with the help of already existing work on the ethics of algorithms. As a second goal, the article explores what kinds of solutions are available in that body of scholarship, and how these solutions relate to some of the ethical questions around BCIs. In short, the article asks what lessons can be learned about the ethics of BCIs from looking at the ethics of algorithms. To achieve these goals, the article proceeds as follows. First, a brief introduction into the algorithmic background of BCIs is given. Second, the debate about epistemic concerns and the ethics of algorithms is sketched. Finally, this debate is transferred to the ethics of BCIs.

POPDC proteins and cardiac function

2019 ◽  
Vol 47 (5) ◽  
pp. 1393-1404 ◽  
Author(s):  
Thomas Brand
Keyword(s):  
Potential Role ◽  
Striated Muscle ◽  
Short Review ◽  
Effector Proteins ◽  
Muscle Disease ◽  
Disease Genes ◽  
Protein Protein Interaction ◽  
Interaction Partners ◽  
And Function

Abstract The Popeye domain-containing gene family encodes a novel class of cAMP effector proteins in striated muscle tissue. In this short review, we first introduce the protein family and discuss their structure and function with an emphasis on their role in cyclic AMP signalling. Another focus of this review is the recently discovered role of POPDC genes as striated muscle disease genes, which have been associated with cardiac arrhythmia and muscular dystrophy. The pathological phenotypes observed in patients will be compared with phenotypes present in null and knockin mutations in zebrafish and mouse. A number of protein–protein interaction partners have been discovered and the potential role of POPDC proteins to control the subcellular localization and function of these interacting proteins will be discussed. Finally, we outline several areas, where research is urgently needed.

The Effect of Path Length and Display Size on Memory for Spatial Information

2012 ◽  
Vol 59 (3) ◽  
pp. 147-152 ◽  
Author(s):  
Katherine Guérard ◽  
Sébastien Tremblay
Keyword(s):  
Path Length ◽  
Potential Role ◽  
Spatial Information ◽  
Recall Performance ◽  
Minor Role ◽  
Length Effect ◽  
Serial Memory ◽  
Fixed Reference ◽  
A Minor

In serial memory for spatial information, some studies showed that recall performance suffers when the distance between successive locations increases relatively to the size of the display in which they are presented (the path length effect; e.g., Parmentier et al., 2005) but not when distance is increased by enlarging the size of the display (e.g., Smyth & Scholey, 1994). In the present study, we examined the effect of varying the absolute and relative distance between to-be-remembered items on memory for spatial information. We manipulated path length using small (15″) and large (64″) screens within the same design. In two experiments, we showed that distance was disruptive mainly when it is varied relatively to a fixed reference frame, though increasing the size of the display also had a small deleterious effect on recall. The insertion of a retention interval did not influence these effects, suggesting that rehearsal plays a minor role in mediating the effects of distance on serial spatial memory. We discuss the potential role of perceptual organization in light of the pattern of results.

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