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Dual-egocentre hypothesis on angular errors in visually directed pointing.

Koichi Shimono¹, Atsuki Higashiyama

¹Department of Logistics & Information Sciences, Tokyo University of Marine Science and Technology, Ettchujima 2-1-6, Koto-ku, Tokyo 135-8533, Japan shimono@kaiyodai.ac.jp

|December 2, 2011

Summary

This summary is machine-generated.

Angular errors in pointing are linked to differences between visual and kinesthetic egocenters. This study suggests a transfer of directional information between visual and kinesthetic spaces during motor tasks.

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Area of Science:

* Cognitive Neuroscience
* Human Motor Control
* Perception and Action

Background:

* Understanding sensorimotor transformations is crucial for explaining motor control.
* Egocenter location is hypothesized to influence spatial accuracy in pointing tasks.

Purpose of the Study:

* To test the hypothesis that angular errors in visually directed pointing stem from discrepancies between visual and kinesthetic egocenter locations.
* To investigate the relationship between visual and kinesthetic egocenters in motor control.

Main Methods:

* Three experiments involving visually and kinesthetically directed pointing and reaching tasks.
* Measurement of angular errors in pointing and reaching under varying sensory conditions and target distances.

Main Results:

* Angular errors in visually directed pointing frequently matched those in kinesthetically directed pointing.
* Results were consistent across different egocentric distances.
* Visually directed pointing errors aligned with visually directed reaching errors when using the kinesthetic egocenter as a reference.

Conclusions:

* Angular errors in visually and kinesthetically directed pointing are influenced by the egocenter.
* Evidence suggests a reciprocal transfer of egocentric directional information between visual and kinesthetic spatial representations.