TY - JOUR
T1 - Effects of caffeine on anticipatory control processes
T2 - evidence from a cued task-switch paradigm
AU - Tieges, Zoë
AU - Snel, Jan
AU - Kok, Albert
AU - Plat, Niels
AU - Ridderinkhof, Richard
PY - 2007
Y1 - 2007
N2 - Effects of caffeine on task switching were studied using ERPs in a cued task-switch paradigm. The need for advance preparation was manipulated by varying the number of task-set aspects that required switching. In a double-blind, within-subjects experiment, caffeine reduced shift costs compared to placebo. ERPs revealed a negative deflection developing within the preparatory interval, which was larger for shift than for repeat trials. Caffeine increased this shift-induced difference. Furthermore, shift costs increased as a function of the number of task-set features to be switched, but this pattern was not modulated by caffeine. The results suggest that caffeine improves task-switching performance by increasing general effects on task switching, related to task-nonspecific (rather than task-specific) anticipatory processes. Caffeine's actions may be mediated by dopaminergic changes in the striatum or anterior cingulate cortex.
AB - Effects of caffeine on task switching were studied using ERPs in a cued task-switch paradigm. The need for advance preparation was manipulated by varying the number of task-set aspects that required switching. In a double-blind, within-subjects experiment, caffeine reduced shift costs compared to placebo. ERPs revealed a negative deflection developing within the preparatory interval, which was larger for shift than for repeat trials. Caffeine increased this shift-induced difference. Furthermore, shift costs increased as a function of the number of task-set features to be switched, but this pattern was not modulated by caffeine. The results suggest that caffeine improves task-switching performance by increasing general effects on task switching, related to task-nonspecific (rather than task-specific) anticipatory processes. Caffeine's actions may be mediated by dopaminergic changes in the striatum or anterior cingulate cortex.
U2 - 10.1111/j.1469-8986.2007.00534.x
DO - 10.1111/j.1469-8986.2007.00534.x
M3 - Article
C2 - 17539921
VL - 44
SP - 561
EP - 578
JO - Psychophysiology
JF - Psychophysiology
SN - 0048-5772
IS - 4
ER -