1. 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

2. > ≈ Diedrichsen et al. 2001 L S L

3. > Diedrichsen et al. 2001 L S L RPRSSIRPRSSI

4. > Diedrichsen et al. 2006; Heuer, Klein 2006 Psychol Res RPRSSIRS RP SI

5. Which movement parameters cause interference during the preparation of bimanual movements? Symmetric Starting locations Symmetric Amplitudes Symmetric Target locations Symmetric Starting locations Asymmetric Amplitudes Asymmetric Target locations All symmetric SATSAT

6. All symmetric SAT Symmetric amplitudes Asymmetric starting, targets SAT

7. Symmetric targets Asymmetric starting, amplitudes SAT Symmetric starting Asymmetric amplitudes, targets SAT All asymmetric SAT

8. 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

9. SATSATSATSATSAT

10. SATSATSATSAT

11. Method 30 participants – Right-handed 40 good trials per block Recorded RT and MT 10 cm 1.4 cm

12. SAT SATSAT

13. SATSAT * * *

14. SATSAT SATSAT * * n.s.

15. Conclusions > RPRSSIRS RP SI

16. SAT < 20102010 More complex than programming only the amplitude

17. < SAT Symmetric targets More complex than programming only the target locations Symmetric targets

18. SAT < Movement amplitudes

19. < < Starting and target locations Symmetric startingAsymmetric starting Symmetric targetsAsymmetric targets

20. -8 ms SAT -2 ms SATSAT -10 ms SATSAT

21. -12 ms SAT -14 ms SAT -2 ms SAT

22. 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

23. SAT SATSAT

24. Movement time

25. Delta reaction time

26. Delta total time

27. Movement time correlations

28. Imperative Stimulus Recognition Target Discrimination Response Selection Response Programming Response Initiation Imperative Stimulus Recognition Response Initiation Choice reaction time Simple reaction time Imperative stimulus