Limitations to the sense of agency over myoelectric controlled movements
DOI:
https://doi.org/10.57922/mec.2488Abstract
Prosthetic embodiment, the extent to which individuals perceive their prosthesis as an integral part of their body, is associated with lower prosthetic abandonment and is seen as a measure of how satisfied users are with their device. While there is no gold standard method to quantify embodiment, measurement techniques from the field of Human Computer Interfaces might allow us to quantify embodiment, and allow us to parse where reductions in embodiment originate. As muscle signals have a higher variance than movement patterns, it is possible that this increase in variance lowers people's sense of ownership over their actions when they use myoelectric control. Sense of agency is a measure that refers to the experience of feeling in control of one's actions, and the outcome those actions have on the environment. We compared the sense of agency over myoelectric and joystick controlled movements of 10 participants through a tracking task. While performing the tracking task, different levels of noise were added to the control signal before feedback was given to the participants, allowing us to impose different levels of control. We found that people rated their sense of agency over myoelectric controlled movements significantly lower than over joystick controlled movements (p < 0.001), and that this decrease was not only dependent on lower accuracies during the tracking task. These results suggest there might be an upper limit to the sense of agency over myoelectric controlled movements.
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Published
2024-08-15
How to Cite
[1]
S. Mehigan and S. Dupan, “Limitations to the sense of agency over myoelectric controlled movements”, MEC Symposium, Aug. 2024.
Conference Proceedings Volume
Section
User Experience
