Stimuli caused by self-initiated actions are perceived as less intense than those caused externally; this effect is called sensory attenuation (SA). In two experiments, we aimed to assess the impact of the amplitude of outcomes and its affective valence on SA and explicit ratings of sense of agency. This allowed us to test the predictions of the available SA frameworks and better understand the link between SA, affect, and agency. The results indicated that SA can be reversed, and such sensory amplification is driven by low-amplitude and positive-valence outcomes. We also show that intentional action influences the perceived valence of outcomes, and that modulations of explicit sense of agency are divergent from those of SA. Our study shows that valence influences the processing of the amplitude of intentional action outcomes and suggests that none of the currently available frameworks give full justice to SA’s variability.

由自我发起的行为引起的刺激被认为不如外部引起的强烈；这种效应称为感觉衰减 (SA)。在两个实验中，我们旨在评估结果的幅度及其对 SA 和明确的代理感评级的情感效价的影响。这使我们能够测试可用 SA 框架的预测并更好地了解 SA、影响和代理之间的联系。结果表明 SA 可以逆转，这种感觉放大是由低幅度和正价结果驱动的。我们还表明，有意的行为会影响结果的感知效价，并且显性代理感的调制与 SA 的调制不同。