A customizable headgear assembly for neuropsychological and neurological treatment, monitoring, or testing of a patient. The headgear assembly comprising a structural frame having a plurality of anatomical landmark tabs each individually configured to be located upon an anatomical landmark of a patient's head. The structural frame having first and second portions releasably coupled to enable the first and second portions to be at least partially separated for placement and removal from the patient's head. A plurality of electrode holders being operable coupled to the structural frame each configured to locate an electrode upon a predetermined neurological position of the patient.