Fig. 1

The experiment was conducted during the first three phases of a parabolic flight manoeuvre, starting with Earth gravity (1 G), followed by hypergravity (1.8 G) and weightlessness (0 G). The participants had to solve a dual-task (SpaceMan), which consisted of playing a continuous navigation task (Pac-Man) as a primary task and an auditory oddball paradigm as a secondary task. This was done during 25 consecutive parabolas.