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Interference during the preparation of bimanual movements: the role of asymmetric starting locations, movement
amplitudes, and target locations
Jarrod Blinch, BG Rasman, K Clark, C May,BD Cameron, IM Franks, MG Carpenter, R Chua
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≈
Diedrichsen et al. 2001
L S L L
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>
Diedrichsen et al. 2001
L S L L
RPRSSIRPRSSI
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Diedrichsen et al. 2006; Heuer, Klein 2006 Psychol Res
RPRSSIRS RPSI
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Which movement parameters cause interference during the preparation of bimanual movements?
Symmetric Starting locationsSymmetric Amplitudes
Symmetric Target locations
Symmetric Starting locationsAsymmetric Amplitudes
Asymmetric Target locations
All symmetric SATSAT
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All symmetricSAT
Symmetric amplitudesAsymmetric starting, targets
SAT
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Symmetric targetsAsymmetric starting, amplitudes
SAT
Symmetric startingAsymmetric amplitudes, targets
SAT
All asymmetricSAT
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Heuer, Klein 2006 J Mot Behav • Manipulated
symmetry/asymmetry of– Starting locations– Amplitudes– Target locations
• Confound– Number of movement
choices depended on the starting locations
Weigelt 2007• Manipulated
symmetry/asymmetry of– Starting locations– Amplitudes– Target locations
• Confound– Symbolic cues
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SAT SAT SAT SAT SAT
SAT
SAT
SAT
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SAT
SAT
SAT
SAT
SATSATSATSAT
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Method
• 30 participants– Right-handed
• 40 good trials per block• Recorded RT and MT
10 cm
1.4 cm
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SAT
SATSATSATSAT
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SAT
SATSATSATSAT
** *
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SAT
SATSATSATSAT
SAT
SATSATSATSAT
* *
n.s.
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Conclusions
>
RPRSSIRS RPSI
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SAT
SAT
<
20 10 20 10
More complex than programming only the amplitude
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<
SAT SAT
Symmetric targets
More complex than programming only the target locations
Symmetric targets
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SAT
<SAT
Movement amplitudes
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<
<
Starting and target locations
Symmetric starting Asymmetric starting
Symmetric targets Asymmetric targets
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-8 ms
SAT
-2 ms
SAT
-10 ms
SAT
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-12 ms
SAT
-14 ms
SAT
-2 ms
SAT
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Interference during the preparation of bimanual movements: the role of asymmetric starting locations, movement
amplitudes, and target locations
Jarrod Blinch, BG Rasman, K Clark, C May,BD Cameron, IM Franks, MC Carpenter, R Chua
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SAT
SATSATSATSAT