User Test: How Many Users Are Needed to Find the Psychophysiological Pain Points in a Journey Map? - Lamontagne, Charles; Sénécal, Sylvain; Fredette, Marc; Chen, Shang Lin; Pourchon, Romain; Gaumont, Yohan; De Grandpré, David; Léger, Pierre-Majorique (Human Interaction and Emerging Technologies. IHIET 2019, 2019)