JournalofFamilyTherapy(2010)32:58–720163-4445(print);1467-6427(online)‘Heartsontheirsleeves’:theuseofsystemicbiofeedbackinschoolsettingsBrendaMcHugh,NeilDawson,AnthonyScraftonandEiaAsenaThisarticledescribeshowabiofeedbackdeviceisusedto‘externalize’internalphysiologicalstates Heartratemonitors,emittingaudiblesignalswhenaspeci& 64257;cthresholdisreached,are& 64257;ttedtochildrenandmembersoft