A Diversity–Distraction–Dependency System as a Positive Human Factor in Crews’ Interplanetary Missions

In successful scenarios of missions to the Moon and Mars, humans develop multi-factorial systems through adapted behaviors to build cohesive multi-national crews with their individual features. We assume that frequencies of social interactions, social orientations, and facial vs. collateral expressions change according to mixed-culture and mixed-gender crew characteristics and as a function of the crewmember’s grouping at the same time and in the same place. The ethological method, with the phases of observation, description, and quantification of behavioral manifestations, was applied to the SIRIUS program and MARS-500 program. This involved simulating a 120-day confinement, a 240-day confinement, and a 520-day confinement in a multi-module facility. Focus was made on the meal area, sports area, and leisure area. We investigated the full nationality–gender-varied crew and the crewmember’s attendance and localization for distractive or festive activities during their free time. Social optimization declined and then grew in a temporal dynamic. Global behavioral distribution showed differences according to the duration of experiments during collective time. As a result, a system based on crew diversity, crew distraction, and crewmembers’ inter-dependence should be considered as a positive human factor in the process of adaptation with the goal of enhancing the well-being of future interplanetary crews.