Bars represent bias corrected and accelerated 95% confidence intervals estimated using bootstrapping. a. Variability in personality states. Bars represent the standard deviation of the national daily states; the standard deviation value is also printed next to the bar. Longer bars (higher values) indicate greater levels of variability. b. Instability in national states, as measured using the mean square of successive difference (MSSD) from one day to the next. Bars present the value of the MSSD. Longer bars indicate greater instability, which captures both the tendency to change and change amplitude. c. Inertia in national states, as measured using the autocorrelation. Positive values indicate that on any day, the nation is more likely than not to be in a similar state as the day before, while negative values indicate that the nation is more likely to have changed.