
관련 연구
http://www.psychologytoday.com/blog/time-out/201301/laughter-and-loneliness
http://www.bu.edu/writingprogram/journal/past-issues/issue-5/mcclenathan/
http://www.brainpickings.org/2014/11/06/language-lying-deception/
http://www.cyquest.com/pathway/resistance.html
"people don't cry because they're weak. It's because they've been strong for too long."
http://www.ncbi.nlm.nih.gov/pubmed/20148392
http://www.ncbi.nlm.nih.gov/pubmed/20823727
http://www.sciencedirect.com/science/article/pii/S0191886911001528