Neurofeedback, or biofeedback, is a non-invasive process that uses real-time feedback to help a person learn to self-regulate their brain activity. It involves measuring brain waves using sensors placed on the scalp, and then providing feedback to the person through a visual or auditory display. The person is then able to learn to control their brain activity by making changes to their thoughts and behaviors in response to the feedback. A number of studies have shown that neurofeedback is a promising treatment option for generalized anxiety disorder.