Fig. 3.
Secondary cognitive function measures mean plots (± SE) for a Mental Effort Scale and b Karolinska Sleepiness Scale (ITT Analysis Set)
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.