Abstract: Carbon dioxide (CO2) at concentrations well below those typically found on the International Space Station (ISS) have been reported to cause significant deterioration of higher cognitive functions in college-aged adults (Satish et al., 2012). Given that evidence suggests that thresholds for some clinically significant effects of CO2 are considerably less in space than they are on the ground (Law et al., 2014), it is important to determine if cognitive functions of crew-like subjects are affec…