Seeking participants for brain stimulation for math and spatial reasoning
We are recruiting young adults (age 18-35) for a study of transcranial Alternating Current Stimulation effects (tACS) on mental rotation and arithmetic. Participants will be compensated with 200 kr/hour plus transportation expenses, if applicable.
tACS is a safe non-invasive technique for neural stimulation of very weak intensity, thought to work by promoting synchronized firing of neuronal populations to the applied frequency.
It is widely used in cognitive neuroscience research and it has been shown to enhance working memory and working memory training.
Each stimulation lasts for 25 mins. Participants will perform arithmetical, mental rotation and working memory tasks during the tACS stimulation. Sessions will be performed in separate days. Participants may also partake in a separate follow-up testing, if interested.
The study will take place in late winter-mid spring.
Individuals will be screened prior to the first session, and may not participate if ANY of the following apply:
- Neurological conditions (e.g. brain tumor, personal or family history of epilepsy, a history of symptomatic seizures, polyneuropathy).
- Severe alcohol or drug abuse (and also any consumption of alcohol or recreational drugs 24 hours prior to the study).
- Psychiatric conditions such as depression, anxiety, anhedonia, or severe language disturbances.
- Metallic implants (e.g., vascular clips, cochlear implant) in the cranium (except in the mouth), pacemaker, implanted medication pumps, neural stimulators.
- Drug treatments, especially psychoactive drugs, acting primarily on the central nervous system which lower the seizure threshold, such as antipsychotic drugs (chlorpromazine, clozapine) or tricyclic antidepressants.
- Any visual disturbances, especially corrected visual acuity <60%.
- Diseased or damaged skin over the face or scalp.
- Personal history of migraines (brain stimulation may increase susceptibility to headaches in migraineurs)
- Other known neurological, psychiatric or disabling systemic disease.
- Unable to give informed consent.
The study has all the permits required.