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.
Timeline of the experimental design. The red cross marks the onset of a reaction task to monitor the subjects attention. Actual stimuli are delivered either through a Teflon-tube with a constant stream of air into the subjects left nostril (for gaseous ammonia, rose odor, air puffs) or via a monitor (visual stimulation). After each trial the intensity and unpleasantness of the stimulus was rated. Each condition was repeated 15 times and trials were presented in randomized order.
