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 values of three variables increase in both groups during time but in the experimental group this amount increases with the little bigger slope. (Series 1: Experimental Group, Series 2: Control Group. 1: Pre-test, 2: Post-test)
