 Family memberscaregiver friends and persons with ABI who are at least three months postinjury will be eligible to participate in the present investigation. ABI is defined as damage to brain tissue caused by stroke, aneurysm, anoxia, non-progressive brain tumor, infection, or an external mechanical force as evidenced by: loss of consciousness, post traumatic amnesia PTA, objective neurological findings, or skull fracture. Penetrating wounds fitting the definition listed above will be included. Lacerations andor bruises of the scalp or forehead without other criteria listed above will be excluded. All participants must be at least 18 years of age or older and able to understand and provide consent. 