Figure 1.
Intraclass correlation between test and retest. Top line, +1.96 SD; middle line, mean; bottom line, −1.96 SD.
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.