Agency has two meanings in psychology and neuroscience. It can refer to one's capacity to affect the world and act in line with one's goals and desires--this is the objective aspect of agency. But agency can also refer to the subjective experience of controlling one's actions, or how it feels to achieve one's goals or affect the world. This subjective aspect is known as the sense of agency, and it is an important part of what makes us human.

Interest in the sense of agency has exploded since the early 2000s, largely because scientists have learned that it can be studied...