We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleConcussion in contact sports: reliable change indices of impairment and recovery.AuthorsHinton-Bayre AD; Geffen GM; Geffen LB; McFarland KA; Friis PPublicationJournal of clinical and experimental neuropsychology, 1999, Vol 21, Issue 1, p70ISSN1380-3395Publication typearticleDOI10.1076/jcen.21.1.70.945