Empathy is the ability to share and understand the emotions of others. It is a construct of multiple components, each of which is associated with its own brain network. There are three ways of looking at empathy.
First there is affective empathy. This is the ability to share the emotions of others. People who score high on affective empathy are those who, for example, show a strong visceral reaction when watching a scary movie. [...]
Cognitive empathy, on the other hand, is the ability to understand the emotions of others. A good example is the psychologist who understands the emotions of the client in a rational way, but does not necessarily share the emotions of the client in a visceral sense.
Finally, there’s emotional regulation. This refers to the ability to regulate one’s emotions. For example, surgeons need to control their emotions when operating on a patient.
Another way to understand empathy is to distinguish it from other related constructs. For example, empathy involves self-awareness, as well as distinction between the self and the other. In that sense it is different from mimicry, or imitation. [...]
That said, empathy is not a unique human experience. It has been observed in many non-human primates and even rats. [...]
Interestingly, people with higher psychopathic traits typically show more utilitarian responses in moral dilemmas such as the footbridge problem. In this thought experiment, people have to decide whether to push a person off a bridge to stop a train about to kill five others laying on the track.