Dr. Chris Friesen, Ph.D., C.Psych., BCN (board certified in EEG-Neurofeedback) At Niagara Neuropsychology, we offer 3 levels of ADHD/ADD assessments. We also offer psychological and neuromodulation (e.g., neurofeedback and biofeedback) treatments for ADHD and related difficulties (e.g., depression, anxiety, concussion, etc.).