Psychological theory proposed by Arthur Aron
The self-expansion model proposes that individuals seek to expand their sense of self by acquiring resources, broadening their perspectives, and increase competency to ultimately optimize their ability to thrive in their environment.[1][2][3] It was developed in 1986 by Arthur Aron and Elaine Aron to provide a framework for the underlying experience and behavior in close relationships. The model has two distinct but related core principles: the motivational principle and the inclusion-of-other-in-self principle. The motivational principle refers to an individual's inherent desire to improve their self-efficacy and adapt, survive, and reproduce in their environment. The inclusion-of-other-in-self principle posits that close relationships serve as the primary way to expand our sense of self as we incorporate the identities, perspectives, resources, and experiences of others as our own through these relationships.
