Late backward effects in the refractory period paradigm: effects of Task 2 execution on Task 1 performance |
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Authors: | Susana Ruiz Fernández Rolf Ulrich |
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Institution: | 1. Cognitive and Biological Psychology, University of Tübingen, Friedrichstr. 21, 72072, Tübingen, Germany
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Abstract: | The central bottleneck model assumes that in the psychological refractory paradigm, Task 1 performance is independent of Task
2 demands. Previous studies, however, have reported backward crosstalk effects of motor demands in Task 2 on Task 1 performance.
These effects have been attributed to interference at the central level. The present study aimed to isolate more directly
potential backward effects at the motor level. Therefore, in three experiments, movement distance in Task 2 was manipulated
using a guided ballistic movement. The results showed that movement distance in Task 2 affected reaction time as well as response
duration in Task 1. It is argued that the backward effect observed in this study is due to response coupling at motor rather
than central levels. |
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Keywords: | |
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