The primary objective of this thesis’s project is a component of a comprehensive work designed to investigate emotionally authentic expressions triggered by the presentation of specific virtual environments in a controlled laboratory setting. In this research, the focus is on examining the duration of facial expressions concerning the elicited emotion and classifying these expressions into the three primary categories: macroexpressions, microexpressions and self-soothing expressions. In this experiment, participants were exposed to 13 scenarios in Virtual Reality, carefully designed to elicit emotional responses. A total of 31 participants, aged between 19 and 34, were recruited for this study. Prior to their participation, all individuals completed questionnaires assessing alexithymia and empathy.