Simulation requires activation of self-knowledge to change self-concept.

Simulating other people can shift one's self-concept, an effect known as simulation-induced malleability. How does imagining others shift the self? We propose that the activation of self-knowledge is the key factor by which simulation of others alters one's self-concept. We test this possibility across four studies that each manipulate self-knowledge activation indirectly during simulation and measure the impact on subsequent self-ratings. Results demonstrate that increasing activation of self-knowledge during simulation is associated with increased self-concept change. People experienced greater self-concept change when simulating similar others (Studies 1 and 2). People also generalized simulation-induced changes to aspects of the self-concept that were semantically similar to the simulated content (Study 3). Finally, people who are less likely to recruit self-knowledge (i.e., older adults) during simulation were less susceptible to self-concept change (Study 4). These studies highlight self-knowledge activation as an essential component of the effects of simulation on self-rated change. (PsycInfo Database Record (c) 2024 APA, all rights reserved).