Numerous lines of research suggest that communicative dyadic actions elicit preferential processing and more accurate detection compared to similar but individual actions. However, it is unclear whether the presence of the second agent provides additional cues that allow for more accurate discriminability between communicative and individual intentions or whether it lowers the threshold for perceiving third-party encounters as interactive. We performed a series of studies comparing the recognition of communicative actions from single and dyadic displays in healthy individuals. A decreased response threshold for communicative actions was observed for dyadic vs. single-agent animations across all three studies, providing evidence for the dyadic communicative bias. Furthermore, consistent with the facilitated recognition hypothesis, congruent response to a communicative gesture increased the ability to accurately interpret the actions. In line with dual-process theory, we propose that both mechanisms may be perceived as complementary rather than competitive and affect different stages of stimuli processing.

许多研究表明，与类似但单独的行为相比，交际二元行为会引发优先处理和更准确的检测。然而，尚不清楚第二个代理的存在是否提供了额外的线索，允许更准确地区分交流和个人意图，或者它是否降低了将第三方遭遇视为互动的门槛。我们进行了一系列研究，比较了健康个体对单一和二元显示的交流行为的识别。在所有三项研究中，观察到二元与单代理动画的交流动作响应阈值降低，为二元交流偏见提供了证据。此外，与促进识别假设一致，对交流手势的一致反应提高了准确解释动作的能力。根据双过程理论，我们提出这两种机制可能被视为互补而非竞争，并影响刺激处理的不同阶段。