Evaluation of a mixed controller that amplifies spatial errors while reducing timing errors

Marchal Crespo, Laura; Baumann, Tanja; Fichmann, Daniela; Maassen, Steve; Duarte, Jaime E.; Riener, Robert (18 October 2016). Evaluation of a mixed controller that amplifies spatial errors while reducing timing errors. International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2016, pp. 5136-5139. IEEE 10.1109/EMBC.2016.7591883

[img] Text
07591883.pdf - Published Version
Restricted to registered users only
Available under License Publisher holds Copyright.

Download (1MB) | Request a copy

Previous results suggest that haptic guidance enhances learning of the timing components of motor tasks, whereas error amplification is better for learning the spatial components. In this paper we evaluate a novel mixed guidance controller that combines haptic guidance and error amplification to simultaneously promote learning of the timing and spatial components. The controller is realized using a saddle-like force field around the desired movement position. This force field has a stable manifold tangential to the trajectory that guides subjects in velocity related aspects. The force field has its unstable manifold perpendicular to the trajectory, which amplifies the normal (spatial) error. We conducted an experiment with twenty nine healthy subjects to test whether training with the mixed guidance controller resulted in better learning than training without guidance or with guidance-as-needed. Subjects trained two tasks: a continuous rhythmic task (circle) and a continuous single task (line). We found that the effectiveness of the training strategy depended on the task. Training with mixed guidance was especially beneficial for learning the timing components of the line, but limited learning of the circle. Perhaps the continuous change in the force directions during training of the circle was too difficult to interpret.

Item Type:

Conference or Workshop Item (Paper)

Division/Institute:

10 Strategic Research Centers > ARTORG Center for Biomedical Engineering Research > ARTORG Center - Motor Learning and Neurorehabilitation
10 Strategic Research Centers > ARTORG Center for Biomedical Engineering Research > ARTORG Center - Gerontechnology and Rehabilitation

UniBE Contributor:

Marchal Crespo, Laura and Riener, Robert

Subjects:

600 Technology > 610 Medicine & health
600 Technology > 620 Engineering

ISSN:

1558-4615

ISBN:

978-1-4577-0220-4

Publisher:

IEEE

Language:

English

Submitter:

Angela Amira Botros

Date Deposited:

11 Jul 2018 17:52

Last Modified:

22 Oct 2019 19:22

Publisher DOI:

10.1109/EMBC.2016.7591883

PubMed ID:

28269423

BORIS DOI:

10.7892/boris.117130

URI:

https://boris.unibe.ch/id/eprint/117130

Actions (login required)

Edit item Edit item
Provide Feedback