Fig. 4: Time error for durations in hours.
From: Time perception in astronauts on board the International Space Station

Box and whisker plots of the error in perceived duration since the start of the work day (a) and since lunch (b) in 10 astronauts during spaceflight and 15 subjects during 3 sessions (S1, S2, S3) in the laboratory. Filled symbol represents the mean, center line represents the median, bounds of box represent the first and third quartiles, and whiskers represent the minimum and maximum values in the set. *p < 0.05 (Sample Mann–Whitney test).