Hopkins, Brian and Churchill, Andrew and Vogt, Stefan and Rönnqvist, Louise (2004) Braking reaching movements : a test of the constant tau-dot strategy under different viewing conditions. Journal of Motor Behavior, 36 (1). pp. 3-12.Full text not available from this repository.
Following F. Zaal and R. J. Bootsma (1995), the authors studied whether the decelerative phase of a reaching movement could he modeled as a constant tau-dot strategy resulting in a soft collision with the object. Specifically. they investigated whether that strategy is sustained over different viewing conditions. Participants (N =11 ) were required to reach for 15- and 50-mm objects at 2 different distances under 3 conditions in which visual availability of the immediate environment and of the reaching hand were varied. Tau-dot estimates and goodness-of-fit were highly similar across the 3 conditions. Only within-participant variability of tau-dot estimates was increased when environmental cues were removed. That finding suggests that the motor system uses a tau-dot strategy involving the intermodal (i.e., visual. pro-prioceptive. or both) specification of information to regulate the decelerative phase of reaching under restricted viewing conditions. The authors provide recommendations for improving the derivation of t<sub>x</sub> estimates and stress the need for further research on how time-to-contact information is used in the regulation of the dynamics of actions such as reaching.
|Journal or Publication Title:||Journal of Motor Behavior|
|Uncontrolled Keywords:||decelerative phase environmental structure low-velocity phase tau visual feedback|
|Subjects:||B Philosophy. Psychology. Religion > BF Psychology|
|Departments:||Faculty of Science and Technology > Psychology|
|Deposited By:||Mrs Karen Gerrard|
|Deposited On:||25 Jun 2008 15:29|
|Last Modified:||26 Jul 2012 14:42|
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