Imagining Your Virtual Arm Increases Stress Response
Author Information
Author(s): Hägni Karin, Eng Kynan, Hepp-Reymond Marie-Claude, Holper Lisa, Keisker Birgit, Siekierka Ewa, Kiper Daniel C.
Primary Institution: ETH Zurich
Hypothesis
Can simple movement observation coupled with motor imagery induce measurable ownership of an external limb?
Conclusion
The study found that imagining a virtual arm as one's own significantly increased the physiological stress response to a threat compared to just observing the arm.
Supporting Evidence
- The observation-with-imagery group showed a significantly higher skin conductance than the observation-only group after the threat.
- Both groups exhibited increased skin conductance in response to the unexpected threat.
- Participants reported no significant differences in their subjective feelings of ownership despite physiological differences.
Takeaway
If you imagine a virtual arm as your own while watching it, your body reacts more strongly to threats to that arm, like it would if it were real.
Methodology
Participants watched a video of virtual arms and were divided into two groups: one that only observed and another that imagined the arms as their own, while their skin conductance was measured.
Potential Biases
Potential biases in self-reported measures of enjoyment and task difficulty could affect the results.
Limitations
The study's findings may not generalize to more immersive or realistic virtual environments.
Participant Demographics
23 right-handed participants (12 observation only: 9 male, 3 female; 11 observation with imagery: 8 male, 3 female; mean age 25.0 years).
Statistical Information
P-Value
p=0.037
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website