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.
The structure of the experiment. All sets of tests are identical at each timepoint. Note that the second set of tests undertaken by the waitlisted control group serve as the post-test relative to their first set of tests; but they serve as the pre-test to their third set of tests (which are post-tests).
