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Conditions
Interventions
Participants will receive one of the following three interventions:
1. Anodal tDCS of the vlPFC (experimental condition)
2. Cathodal tDCS of the vlPFC (to control for polarity)
3. Sham tDCS (to contro
Sponsors
Radboud Universiteit Nijmegen
Eligibility
Age
18 Years to 99 Years
Inclusion criteria
Inclusion criteria: Only healthy, competent, women (18-35 years) with normal or corrected-to-normal vision will be included.
Exclusion criteria
Exclusion criteria: • Serious head trauma or brain surgery • Large or ferromagnetic metal parts in the head (except for a dental wire) • Implanted cardiac pacemaker or neurostimulator • Pregnancy • Skin diseases at intended electrode sites (tCS) • Disorders of vision (i.e., deviation from *normal or corrected-to-normal vision*) • History or current presence of any neurologic or psychiatric disease • Any prescribed medication that can alter cortical excitability (e.g. antiepileptics, tricyclic anti-depressives or benzodiazepines) or can have an influence on the participant*s vigilance or cognitive performance within two weeks prior to participation
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Reaction time and responses, made by the participant, will be used to test whether anodal tDCS of the vlPFC compared with the control tDCS conditions will decrease the instrumental biases evoked by the emotional faces. Furthermore, postural sway will be used to test whether anodal tDCS of the vlPFC compared with the other tDCS conditions will decrease reduction of postural sway evoked by negative emotional faces (as a measure of an automatic emotional response). | — |
Secondary
| Measure | Time frame |
|---|---|
| Enhanced freeze has been shown to be associated with anxiety, whereas decreased emotional influences on instrumental approach-avoidance biases have been found to be associated with instrumental aggression. To account for the effects of individual differences, subjective questionnaires will be administered to assess the individual differences in anxiety, aggression, and attentional control. Data of a non-social version of the task, in terms of reation time and responses, made by the participant, will be used to test whether offline tDCS of the vlPFC will decrease the instrumental biases evoked by the non-social emotional stimuli. | — |
Countries
Netherlands
Outcome results
None listed