Selfish or selfless? On the signal value of emotion in altruistic behavior
Journal of Personality and Social Psychology (2014) - Comment
pubmed: 25133723  doi: 10.1037/a0037207  issn: 1939-1315  issn: 0022-3514 

Alixandra Barasch, Emma E. Levine, Jonathan Z. Berman, Deborah A. Small