Finding the control signals for visually-guided actions

 

Finding the control signals for visually-guided actions

Ricketts 211

The general problem I will consider is how we control visually-guided actions like reaching, manipulating objects, or locomotion. A significant component of visual-motor control involves feedback. Human movements are not generally pre-programmed, but rather emerge from a sequence of online adjustments. In the context of feedback control, the question becomes: what visual signals are used to control an action? I will present experiments that use interactive virtual reality to address this question, for two different actions: (1) aligning the 3D orientation of an object in a manual placement task, (2) walking to a goal location. The results provide insight as to how these particular actions are controlled, and also suggest new issues that arise when one considers how vision is used to control actions, rather than just for perception.
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