An opera singer who played the role of a deeply sad and dispairing woman reported to a researcher that she often felt depressed shortly after each performance. To the researcher, Paul Ekman, it seemed that holding a facial expression etched in sadness was something like a hologram, where a part of the whole could project the whole of the image. Recent research out of the University of Kansas reveals that happiness can also be created in the same way.
In a newly released study, subjects were given stressful tasks while holding chopsticks in their mouths to form a smile, and another group was asked to maintain a smile while performing the stress task. None of the subjects were told the true objective of the study and when physiological measures were compared with a control group performing the same stressful activities, both smiling groups had lower heart rates and faster cardiovascular stress recovery than the non-smiling controls.