Fig. 3: How long since last test session.
From: Time perception in astronauts on board the International Space Station

Box and whisker plots of the error in 10 astronauts’ perceived duration since the last test session before (L−), during (FD), and after (R+) spaceflight. 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. The dotted line represents the average of all pre-flight measurements in the astronaut group. The gray area represents the mean ± standard deviation of measurements taken from 15 control subjects in the laboratory. *p < 0.05 (linear mixed model).