Target-related coupling in bimanual reaching movements |
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Authors: | Matthias Weigelt Martina Rieger Franz Mechsner Wolfgang Prinz |
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Institution: | (1) Department of Psychology, Max Planck Institute for Human Cognitive and Brain Sciences, Amalienstrasse 33, 80799 Muenchen, Germany;(2) Institute of Occupational Physiology, Dortmund, Germany |
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Abstract: | While bimanual interference effects can be observed when symbolic cues indicate the parameter values of simultaneous reaching
movements, these effects disappear under conditions in which the target locations of two movements are cued directly. The
present study investigates the generalizability of these target-location cuing benefits to conditions in which symbolic cues
are used to indicate target locations (i.e., the end points of bimanual movements). Participants were asked to move to two
of four possible target locations, being located either at the same and different distances (Experiment 1), or in the same
and different directions (Experiment 2). Circles and crosses served as symbolic target-location cues and were arranged in
a symmetric or non-symmetric fashion over the four target locations. Each trial was preceded by a variable precuing interval.
Results revealed faster initiation times for equivalent as compared to non-equivalent target locations (same vs. different
cues). Moreover, the time course of prepartion suggests that this effect is in fact due to target-equivalence and not to cue-similarity.
Bimanual interference relative to movement parameter values was not observed. These findings suggest that cuing target locations
can dominate potential intermanual interference effects during the concurrent programming of different movement parameter
values. |
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