 While this sort of situational malleability may not be surprising, a number of psychologists have suggested a much more radical situational malleability. Under certain circumstances, notably when we have a close personal relationship with another person, when we are trying to take the perspective of another person, or when we feel empathy for another person, the conceptual boundary between the self and the other person disappears; the self and the other merge. According to Arthur Aron and colleagues,