TY - JOUR
T1 - Task reconfiguration and carryover in task switching
T2 - An event-related potential study
AU - Hsieh, Shulan
AU - Cheng, Poyu
N1 - Funding Information:
The authors would like to thank the National Science Council of the Republic of china, Taiwan for financially supporting this research under Contract No. NSC93-2413-H-194-002. Partial data were presented at the 46th Annual Meeting of Psychonomic Society in Toronto, 2005. The authors would like to thank Frini Karayanidis and Iring Koch for their helpful comments on earlier versions of the manuscript.
PY - 2006/4/21
Y1 - 2006/4/21
N2 - This study investigated the electrophysiological correlates of the processes involved in task switching. A pair-wise task-switching paradigm was used where each trial comprised two tasks that were either the same (task repeat) or different (task switch). In the paradigm, task-switch and repeat trials are compared in conditions of foreknowledge and non-foreknowledge of the forthcoming task type and during different response-stimulus intervals (RSIs). The results of this study show that, before the second task began in a task-pair trial, i.e., during the RSI, there was a CNV-like negativity for all trials. This indicates a general anticipatory effect. In foreknowledge conditions, there is an additional switch-specific reconfiguration process followed by a task-specific (including both switch- and repeat-related) preparatory process. During the post-task 2 stage, P3b was found to be smaller in switch trials than in repeat trials. Such differential P3b between switch and repeat trials appeared earlier and larger in foreknowledge than in non-foreknowledge conditions. The results of this study support the existence of advance preparation and uphold the role of carryover effects in task switching.
AB - This study investigated the electrophysiological correlates of the processes involved in task switching. A pair-wise task-switching paradigm was used where each trial comprised two tasks that were either the same (task repeat) or different (task switch). In the paradigm, task-switch and repeat trials are compared in conditions of foreknowledge and non-foreknowledge of the forthcoming task type and during different response-stimulus intervals (RSIs). The results of this study show that, before the second task began in a task-pair trial, i.e., during the RSI, there was a CNV-like negativity for all trials. This indicates a general anticipatory effect. In foreknowledge conditions, there is an additional switch-specific reconfiguration process followed by a task-specific (including both switch- and repeat-related) preparatory process. During the post-task 2 stage, P3b was found to be smaller in switch trials than in repeat trials. Such differential P3b between switch and repeat trials appeared earlier and larger in foreknowledge than in non-foreknowledge conditions. The results of this study support the existence of advance preparation and uphold the role of carryover effects in task switching.
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U2 - 10.1016/j.brainres.2006.02.060
DO - 10.1016/j.brainres.2006.02.060
M3 - Article
C2 - 16647689
AN - SCOPUS:33646522696
SN - 0006-8993
VL - 1084
SP - 132
EP - 145
JO - Molecular Brain Research
JF - Molecular Brain Research
IS - 1
ER -