Ostracism and suggestibility: how temporary cognitive deficits drive suggestibility after ostracism

Interrogative suggestibility has been suggested to grow in situations of isolation. The current study aimed to test this assumption for the first time in an experimental approach. We hypothesized that ostracism increases suggestibility, and assumed this relationship to be mediated by cognitive impairments or social uncertainty. To test these hypotheses, we conducted two studies. We manipulated the state of ostracism (vs. inclusion) using the O-Cam (Study 1) and Cyberball paradigm (Study 2), and measured suggestibility using the Gudjonsson Suggestibility Scale. Results revealed an indirect link between inclusionary status and suggestibility. More precisely, there was no direct relationship between ostracism and suggestibility. However, ostracism induced weaker cognitive performances and this translated to increased suggestibility. Social uncertainty, on the other hand, did not serve as effective mediator. These findings indicate that each situation that is accompanied by (temporary) cognitive impairments, as is ostracism, might have the power to raise interrogative suggestibility.