Does Observation of Postural Imbalance Induce a Postural Reaction?
Author Information
Author(s): Tia Banty, Saimpont Arnaud, Paizis Christos, Mourey France, Fadiga Luciano, Pozzo Thierry
Primary Institution: INSERM U887, Université de Bourgogne, Dijon, France
Hypothesis
Does observing postural imbalance trigger a postural reaction in observers?
Conclusion
Observing an upright point-light display of postural imbalance increases observers' body sway.
Supporting Evidence
- Participants swayed more when observing the upright stimulus compared to the control and inverted conditions.
- The contagion effect was dependent on the integration of gravity constraints by body kinematics.
- Postural responses were sensitive to habituation, disappearing after viewing an inverted display.
Takeaway
When people watch someone trying to balance, they might start swaying themselves, even if they are standing still.
Methodology
Participants' body sway was recorded while they observed different visual stimuli: a fixation cross, an upright gymnast, and an inverted gymnast.
Potential Biases
Potential bias in self-reported awareness of body sway effects.
Limitations
The study's findings may not generalize to all populations, as participants were young adults with no postural disorders.
Participant Demographics
20 young adults (9 females, 11 males; mean age 24.5 years).
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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