Fig. 3
From: The effect of long-term exposure to microgravity on the perception of upright
The visual effect (VE) (shown as the blue shaded area in the insert) plotted as a function of time since launch and of the day relative to return to earth with each observer’s data plotted separately. Data from every session performed are plotted for ground controls (open circles) and astronauts (filled circles). One astronaut (filled red circles) had a substantially larger VE than the others. Details of the time of each data collection session are given Table S2
