Is a sigh “just a sigh”? Sighs as emotional signals and responses to a difficult task
Scandinavian Journal of Psychology
Article first published online: 8 JAN 2008
DOI: 10.1111/j.1467-9450.2007.00599.x
http://onlinelibrary.wiley.com/doi/10.1111/j.1467-9450.2007.00599.x/full
谢谢