Abstract：
Our actions shape our everyday experience: what we experience, how we perceive, and remember it are deeply affected by how we interact with the world. Performing an action to deliver a stimulus engages neurophysiological processes which are reflected in the modulation of sensory and pupil responses. We hypothesized that these processes shape memory encoding, parsing the experience by grouping self- and externally generated stimuli into differentiated events. Participants encoded sound sequences, in which either the first or last few sounds were self-generated and the rest externally generated. We tested recall of the sequential order of sounds that had originated from the same (within event) or different sources (across events). Memory performance was not higher for within-event sounds, suggesting that actions did not structure the memory representation. However, during encoding, we observed the expected electrophysiological response attenuation for self-generated sounds, together with increased pupil dilation triggered by actions. Moreover, at the boundary between events, physiological responses to the first sound from the new source were influenced by the direction of the source switch. Our results suggest that introducing actions creates a stronger contextual shift than removing them, even though actions do not directly contribute to memory performance. This study contributes to our understanding of how interacting with sensory input shapes experiences by exploring the relationships between action effects on sensory responses, pupil dilation, and memory encoding. Importantly, it challenges the notion of a meaningful contribution from low-level neurophysiological mechanisms associated with action execution in the modulation of the self-generation effect.
摘要：
我们的行动塑造了我们的日常体验：我们所经历的，我们如何感知，并记住它深受我们与世界互动的影响。执行传递刺激的动作会参与神经生理过程，这些过程反映在感觉和瞳孔反应的调节中。我们假设这些过程形状记忆编码，通过将自我和外部生成的刺激分组为差异化的事件来解析体验。参与者编码了声音序列，其中第一个或最后几个声音是自我产生的，其余的是外部产生的。我们测试了来自相同（事件内）或不同来源（跨事件）的声音的顺序顺序的回忆。事件内声音的内存性能并不高，这表明动作没有构造内存表示。然而,在编码期间，我们观察到自生声音的预期电生理反应衰减，以及由动作引起的瞳孔扩张增加。此外，在事件之间的边界，对来自新源的第一个声音的生理反应受到源开关方向的影响。我们的结果表明，引入行动比移除行动会产生更强的上下文转变，即使动作不会直接影响内存性能。这项研究有助于我们理解如何与感官输入形状的互动体验，通过探索行动效应对感官反应之间的关系，瞳孔扩张,和内存编码。重要的是,它挑战了与行动执行相关的低级神经生理机制在调节自我生成效应中有意义的贡献的概念。
