Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Mean tonic pupil diameter (in mm) as a function of pathologists’ difficulty rating of each image. Boxplot represents data median (horizontal line), quartiles (shaded), minimum and maximum (error bars), and outliers (dots: 1.5 times the interquartile range).
