Taya Irizarry, BSN, MSN, 1 Annette DeVito Dabbs, RN, FAAN, PhD, 1 and Christine R Curran, RN, PhD 1. ... While nearly all the patient portal usability studies that used subjective assessments showed positive results for ease of use and satisfaction, the in-depth objective usability studies were more effective at uncovering a variety of barriers ....