Shibata Hiroshi, Harada Tokiko, Ohira Hideki
Department of Informatics, Nagoya University, Nagoya, Japan.
Front Psychol. 2024 Aug 30;15:1442942. doi: 10.3389/fpsyg.2024.1442942. eCollection 2024.
Interoception, the representation of our bodily state derived from physiological signals, is fundamental to our sense of self. Previous studies using cardiac feedback paradigms demonstrated interoceptive effects on self-perception. However, it remains unclear whether interoceptive information can extend self-attribution to non-bodily objects. This study aimed to elucidate whether cardiac signals can induce self-attribution to non-bodily objects and how interoceptive accuracy modulates this effect. A total of 44 male volunteers participated in an emotion assignment task where they viewed images of palms (bodily targets) and spheres (non-bodily targets) flashing in or out of sync with their heartbeat and assigned emotional images (positive/negative) to these targets. A heartbeat discrimination task was used to measure the interoceptive accuracy. The results showed no significant effect of synchronisation on emotion assignment for either the target type or the valence of the emotional images. However, participants with high interoceptive accuracy attributed both positive and negative images more to synchronised targets than those with low interoceptive accuracy. These findings suggest that although cardiac synchronisation may not uniformly facilitate the self-attribution of external objects, interoceptive accuracy may mediate attention to synchrony. Future studies should explore the conditions under which cardiac signals influence self-attribution.
内感受，即源自生理信号的身体状态表征，是自我意识的基础。先前使用心脏反馈范式的研究证明了内感受对自我认知的影响。然而，内感受信息是否能将自我归因扩展到非身体对象仍不清楚。本研究旨在阐明心脏信号是否能诱导对非身体对象的自我归因，以及内感受准确性如何调节这种效应。共有44名男性志愿者参与了一项情绪分配任务，他们观看与心跳同步或不同步闪烁的手掌（身体目标）和球体（非身体目标）图像，并为这些目标分配情感图像（正面/负面）。使用心跳辨别任务来测量内感受准确性。结果表明，同步对目标类型或情感图像效价的情绪分配均无显著影响。然而，内感受准确性高的参与者比内感受准确性低的参与者将更多的正面和负面图像归因于同步目标。这些发现表明，尽管心脏同步可能不会一致地促进外部对象的自我归因，但内感受准确性可能会调节对同步的关注。未来的研究应探索心脏信号影响自我归因的条件。
