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Practice-related reduction of dual-task costs under conditions of a manual-pedal response combination

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Liepelt,  Roman
Department of Psychology, Münster University, Germany;
Humboldt University Berlin, Germany;
Department Psychology, MPI for Human Cognitive and Brain Sciences, Max Planck Society;

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liepelt_fischer_frensch_schubert_2011.pdf
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Citation

Liepelt, R., Fischer, R., Frensch, P. A., & Schubert, T. (2011). Practice-related reduction of dual-task costs under conditions of a manual-pedal response combination. Journal of Cognitive Psychology, 23(1), 29-44. doi:10.1080/20445911.2011.448025.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0011-F3E2-1
Abstract
Severe dual-task costs emerge when two tasks are performed at the same time. Schumacher, Seymour, Glass, Kieras, and Meyer (2001) showed a complete reduction of dual-task costs after extensive dual-task practice with a visual-manual (VM) task and an auditory-verbal (AV) task. First, we replicated these findings and found task conditions sufficient to achieve a high level of dual-task cost reduction (Experiment 1). Using these conditions, we tested whether the Schumacher et al. findings generalise to a different dual-task situation, in which participants practised a VM task and an auditory-pedal (AP) task (VM-AP) conjointly (Experiment 2). In the VM-AP task situation we found reduced dual-task costs after practice. Dual-task costs, however, remained on a high level after eight sessions of practice and also when extending practice to 12 sessions. No single participant showed evidence for time sharing in the VM-AP dual task. These results suggest that the finding of complete dual-task cost reduction does not generalise to the VM-AP task combination used in the present study. We discuss different factors potentially relevant for the observation of persisting dual-task costs over practice in the VM-AP task.