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 depiction of the symptom provocation paradigm. N=neutral block; W=washing/contamination relevant block; C=checking relevant block; S=symmetry relevant block; A=general aversive block. The schematic is for representational purposes only. All parts were of equal duration. Each block consisted of six pictures displayed for 2 s each
