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.
Learning curves, showing the development of group means of GDV from pretest to retention test for all three treatment groups. Pre, pretest; ts, training session; r, retention test; AVsoni, treatment group AVsoni; AVnat, treatment group AVnat; V, treatment group V. Standard deviations are regarded subsequently.
