Counting blessings versus burdens: an experimental investigation of gratitude and subjective well-being in daily life.
J Pers Soc Psychol. 2003 Feb;84(2):377-89. doi: 10.1037//0022-3514.84.2.377.
J Pers Soc Psychol. 2003.
PMID: 12585811
Clinical Trial.