Some Definitions…taken from In-Mind.org
Altruism is a motivational state with the ultimate goal of increasing another’s welfare.
Egoism is a motivational state with the ultimate goal of increasing one’s own welfare.
Empathic concern is an other-oriented emotional response elicited by and congruent with the plight of a person in need.
Empathy-Altruism Hypothesis is the hypothesis that empathic concern produces altruistic motivation.