“…Using our cost-efficient and physiology-based method, one can empirically investigate the relationships between mental effort and other important IS constructs such as perceived ease of use in a much more sophisticated manner (Dimoka et al, 2011;Dimoka et al, 2012;de Guinea et al, 2014). Furthermore, our approach may complement other eye-tracking approaches such as gaze-fixation analysis in order to improve user experience (Djamasbi, Siegel, & Tullis, 2012;Sheng & Joginapelly, 2012;Eckhardt et al, 2013;Djamasbi, 2014), a triangulation that may also help to better explain the construct of mental effort itself since, until now, research has not defined mental effort and its derivatives well psychometrically (Xie & Salvendy, 2000;Dunaway & Steelman 2013, Matthews, Reinerman-Jones, Barber, & Abich, 2015.…”