Motor Limitation in Dual-Task Processing under Ballistic Movement Conditions

The standard bottleneck model of the psychological refractory period (PRP) assumes that the selection of the second response is postponed until the first response has been selected. Accordingly, dual-task interference is attributed to a single central-processing bottleneck involving decision and res...

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Bibliographic Details
Published in:Psychological science 2006-09, Vol.17 (9), p.788-793
Main Authors: Ulrich, Rolf, Fernández, Susana Ruiz, Jentzsch, Ines, Rolke, Bettina, Schröter, Hannes, Leuthold, Hartmut
Format: Article
Language:English
Subjects:
Ballistics
Brain
Cognitive psychology
Conceptual frameworks
Decision Making
Electrophysiology
Experimental psychology
Experimentation
Experiments
Fingers
Humans
Information processing
Modeling
Modelling
Movement
Neuroscience
Psychomotor Performance
Reaction Time
Refractory periods
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Summary:The standard bottleneck model of the psychological refractory period (PRP) assumes that the selection of the second response is postponed until the first response has been selected. Accordingly, dual-task interference is attributed to a single central-processing bottleneck involving decision and response selection, but not the execution of the response itself. In order to critically examine the assumption that response execution is not part of this bottleneck, we systematically manipulated the temporal demand for executing the first response in a classical PRP paradigm. Contrary to the assumption of the standard bottleneck model, this manipulation affected the reaction time for Task 2. Specifically, reaction time for Task 2 increased with execution time for Task 1. This carryover effect from Task 1 to Task 2 provides evidence for the notion that response execution can be part of the processing bottleneck.
ISSN:0956-7976
1467-9280
DOI:10.1111/j.1467-9280.2006.01783.x