“…• to triangulate objective and perceived user-oriented concepts [65,66,67] using physiological sensor data (i.e., electroencephalographic data [68,69,70,71] and spectra [72,73,74], electrocardiographic data [75,76], electrodermal activity [77], eye fixation [78,79,56], eye pupil diameter [80,81,53,82], facial expressions [83]), and, Page 569…”