The Effects of Noninvasive Neuromodulation on Mental Wellness, Behavior, and Electrophysiology

Inclusion Criteria: * 18-65 years of age, as verified via photo identification with date of birth. * Should be an English speaker, as indicated by being able to read and comprehend the consent form. * Experiment 2 : Participants will be included for a past diagnosis of anxiety within the past year. Exclusion Criteria: * Smokes or uses tobacco products or any form of nicotine excessively * History of head injury with loss of consciousness for more than 5 min * Uncorrected hearing or vision impairment, including color blindness * Currently have or history of brain or mental illness judged likely to interfere with testing, including drug and/or alcohol dependence * History of epilepsy * Brain tumors * Takes medications or drugs judged likely to change brain activity, including psychoactive drugs, stimulants, benzodiazepines, and/or others * Factors that may lead to poor EEG or fNIRS recordings (e.g., hairstyle) * Inadequate sleep * Drug, alcohol or prescription drug intoxication, dependence or addiction * Pregnancy, or becoming pregnant during the course of the study * Mild cognitive impairment or impaired decision making * History of migraines * Experience with neurostimulation (which might unbind or alter the results) * Metal implants in their head or face