Audio clip: Adobe Flash Player (version 9 or above) is required to play this audio clip. Download the latest version here. You also need to have JavaScript enabled in your browser.
Endogenous substances are those that originate from within an organism and include circadian rhythms that allow organisms to anticipate and prepare for precise and regular environmental changes. Participants sit in the little black chair, triggering pre-recorded endogenous audio artifacts that loop continuously throughout the day while gazing out to the exterior.
