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.
Black diamonds and bars represent mean percentages of activities started independently and mean percentages of activity steps carried out correctly per session over blocks of sessions for each of the participants (ie, P1-P8). The number of sessions included in the blocks is indicated by the numerals above the diamonds, bars, or diamond-bar combinations.
