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Event-Related Potentials during Cued and Voluntary Task-Switching Henrike Welpinghus Universität Bremen

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Presentation on theme: "Event-Related Potentials during Cued and Voluntary Task-Switching Henrike Welpinghus Universität Bremen"— Presentation transcript:

1 Event-Related Potentials during Cued and Voluntary Task-Switching Henrike Welpinghus Universität Bremen henrike.welpinghus@gmx.de

2 Question and experiment Which specific processes underlie voluntarily chosen actions? – Comparison between cued and voluntary task-switching EEG measurements on 15 healthy participants (8 male, age: 23.2 ± 2.9 years) Event-related Potentials – P3 component on parietal electrodes 2

3 Repeat Horizontal task Switch From horizontal to vertical task Preparation Execution Cued condition 3 Voluntary condition

4 P3 component during preparation P3 range: 300-600 ms after warning-stimulus onset Reduced amplitude in voluntary condition (F(1,14)=15.49, p=0.001) 4 Lateralization towards right hemisphere (F(2,28)=5.04, p=0.014)

5 Discussion Lateralization towards right hemisphere – Spatial attention (Macaluso & Doricchi, 2013) Reduction of P3 component in voluntary condition – Higher working memory load due to additional cognitive task – Working memory increase  reduction of P3 component (Kok, 2001) Reflecting decision-making process? – Decision might be jittered 5

6 References Kok, A. (2001). On the utility of P3 amplitude as a measure of processing capacity. Psychophysiology, 38(3), 557-577. Macaluso, E., & Doricchi, F. (2013). Attention and predictions: control of spatial attention beyond the endogenous-exogenous dichotomy. Front Hum Neurosci, 7, 685. doi: 10.3389/fnhum.2013.00685 6

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