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.
Schematic of trial procedure at Test, and examples of each of the three types of Prime (Conceptual, Repetition or Unrelated). Duration of each event is given in square brackets (note that spacing of objects on the timeline does not reflect duration).
