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Related Concept Videos

Virtual Work01:20

Virtual Work

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The principle of virtual work states that if a body is in static and dynamic equilibrium, then the sum of all the virtual work done by all external forces and couple moments for any given virtual displacement must be zero.
In static equilibrium, a body can experience an imaginary or virtual movement, such as displacement or rotation. The virtual work done by a force is equal to the dot product of force and virtual displacement in the direction of the force. When it comes to virtually rotating a...
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Principle of Virtual Work: Problem Solving01:13

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The principle of virtual work is an essential concept in the field of mechanics and engineering. This is used to solve problems related to the equilibrium of a structure or system. It is based on the assumption that if a system is in equilibrium, the work done by all the forces during a virtual displacement is zero. This principle is applied by considering virtual displacements of the system and the corresponding work done by internal and external forces.
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Virtual Work for a System of Connected Rigid Bodies01:06

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Virtual work is a powerful method used to solve problems involving several connected rigid bodies. When the system is in equilibrium, virtual work is zero. This allows the calculation of the resulting forces when a system undergoes a virtual displacement. When attempting to analyze such a system, first, use a free-body diagram, where an independent coordinate represents the configuration of the links, and mark its deflected position resulting from the positive virtual displacement.
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Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy01:26

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This lesson explores three gastrointestinal imaging techniques: radionuclide testing, colonic transit studies, and virtual colonoscopy.
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Obedience01:08

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According to obedience research, we may harm others under the forceful pressures of an authority figure (Milgram, 1974). How about if the inappropriate orders were delivered with less force? The increasing interdependence between nurses and physicians compelled Hofling and his colleagues to explore nurses’ reactions to a potentially harmful medical request made by the perceived authority figure, the doctor (Hofling, Brotzman, Dalrymple, Graves, & Pierce, 1966). In this situation,...
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Cognitive Dissonance01:38

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Social psychologists have documented that feeling good about ourselves and maintaining positive self-esteem is a powerful motivator of human behavior (Tavris & Aronson, 2008). In the United States, members of the predominant culture typically think very highly of themselves and view themselves as good people who are above average on many desirable traits (Ehrlinger, Gilovich, & Ross, 2005). Often, our behavior, attitudes, and beliefs are affected when we experience a threat to our...
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Related Experiment Video

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Virtual Reality Experiments with Physiological Measures
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Virtual reality and the new psychophysics.

Beatrice de Gelder1,2, Jari Kätsyri1, Aline W de Borst2

  • 1Brain and Emotion Laboratory, Department of Cognitive Neuroscience, Faculty of Psychology and Neuroscience, Maastricht University, The Netherlands.

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Summary

Virtual reality (VR) offers methodological rigor for studying behavior in natural contexts. Its non-realism can enhance clarity, and its influence stems from acceptance, not belief, in the virtual environment.

Keywords:
beliefembodimentvirtual reality methods

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Area of Science:

  • Psychology
  • Cognitive Science
  • Human-Computer Interaction

Background:

  • Virtual reality (VR) offers potential for rigorous study of context-dependent behavior.
  • Existing recommendations focus on methodological aspects of VR use.
  • This work explores additional benefits and mechanisms of VR influence.

Purpose of the Study:

  • To highlight unique advantages of VR beyond methodological rigor.
  • To examine how VR's perceptual properties enhance research clarity.
  • To differentiate the mechanisms of VR influence: acceptance versus belief.

Main Methods:

  • Conceptual analysis of VR's perceptual characteristics.
  • Discussion of psychological mechanisms underlying VR engagement.
  • Proposal for integrating neuroimaging with embodied VR.

Main Results:

  • VR's relative non-realism and perceptual limitations can increase focus on research-relevant features.
  • VR's influence is primarily driven by "suspension of disbelief" rather than genuine belief in realism.
  • A novel approach combining neuroimaging with embodied VR is suggested.

Conclusions:

  • VR provides a unique research environment by leveraging its distinct perceptual properties.
  • The psychological acceptance of virtual environments is key to VR's impact.
  • Integrating neuroimaging with VR offers new avenues for understanding perception and cognition.