NeuroLex EEG-Based ADHD Assessment Aid, Pivotal Study

Inclusion Criteria: * Subject willing to voluntarily participate in a research study that includes EEG collection and analysis. * Family/patient seeking comprehensive clinical evaluation for attention and/or behavior concerns. * Male or female at least 6 years of age and who will not be over 17.99 years of age upon admission to study. * Willing to stop any and all current psychiatric medications prior to or by entry into study. * Subject and parent (or legal representative) of an educational level and degree of understanding sufficient to communicate suitably with the investigator, rater and study coordinator. Exclusion Criteria: * Previous diagnosis of mental retardation. IQ \< 70 by previous records. * History of seizure disorder or of EEG abnormalities. On anticonvulsants for seizure control. * Metal plate or metal device in the head. * Suicide ideation or gesture and/or homicidal ideation or gesture. * Concomitant medications during participation in a research study. No prescription or nonprescription medications with psychoactive properties that may affect EEG (such as over-the-counter dietary supplements, pseudoephedrine, or phenylpropanolamine). No antipsychotics, no psychostimulants, no antidepressants. Washout of at least one week or longer depending on the medication and clinician's judgment. Medication used for medical reasons must be cleared by research staff with consideration of known effects on EEG. * Known serious medical problems (cardiovascular, hematological, liver, seizure disorder, renal, or chronic respiratory problems).