The Influence Of The Presence Of Others On Social Sharing-type Retrieval-induced Forgetting

In the field of social memory research,it has been found that during the interactive retrieval process of two or more people,the selective retrieval exercise of the information extractor(the speaker)will cause self-forgetting of specific information in the subsequent retrieval task;besides,the speaker's selective retrieval exercise process will also affect the memory retrieval of listener(the listener)in the interactive group,that is,the listener will also forget about specific information.Researchers refer to this phenomenon of memory forgetting caused by the listener's selective retrieval in the process of social interaction as socially shared retrieval-induced forgetting.As for the generation mechanism of this phenomenon,previous evidence based on behavioral studies have speculated that when the listener listened to the selective retrieval of the speaker,the target items were "implicitly" and "synchronously" extracted and practiced.which resulted in the longterm inhibition of other competing items that played a distracting role,and the emergence of socially shared retrieval-induced forgetting.So far,there is no research that directly investigated the cognitive processes and neural mechanisms of socially shared retrieval-induced forgetting in real-action retrieval groups from the perspective of cognitive nerves.Therefore,this study combines behavioral and cognitive neuroscience research methods,and adopts the retrieval practice paradigm of two-person interaction to investigate the social sharing retrieval's characteristics of Induced Forgetting and underlying Cognitive Mechanisms under the conditions of real interaction(in the presence of real people)and false interaction(in the absence of real people).Behavioral evidence shows that,under false interaction conditions,the listener does not show socially shared retrieval-induced forgetting,while under real interaction conditions,the listener appears socially shared retrieval-induced forgetting.The imaging evidence shows that in the prefrontal cortex,the similarity of the neural signals between the speaker and the listener in the real group is significantly higher than that in the non-real group,indicating that in the real speaker group,the similarity in neural activity between the speaking-listening group is higher.In addition,combining the behavioral results with the imaging results,it was found that the higher the similarity of the neural signals between the speaker and listener in the prefrontal cortex,the higher the memory consistency of the speaking-listening group.This study provided cognitive evidence for the listener's "implicit retrieval" hypothesis in a real-interaction retrieval group for the first time.Furthermore,it is confirmed that the listener's "implicit retrieval" and speaker's true retrieval have similar changes in the neural level,and the synchronic changes in neural activity between individuals are related to the formation of group shared memories.