In this experiment, we replicated the effect of muscle engagement on perception such that the recognition of another's facial expressions was biased by the observer's facial muscular activity (Blaesi & Wilson, 2010). We extended this replication to show that such a modulatory effect is also observed for the recognition of dynamic bodily expressions. Via a multilab and within-subjects approach, we investigated the emotion recognition of point-light biological walkers, along with that of morphed face stimuli, while subjects were or were not holding a pen in their teeth. Under the "pen-in-the-teeth" condition, participants tended to lower their threshold of perception of happy expressions in facial stimuli compared to the "no-pen" condition, thus replicating the experiment by Blaesi and Wilson (2010). A similar effect was found for the biological motion stimuli such that participants lowered their threshold to perceive happy walkers in the pen-in-the-teeth condition compared to the no-pen condition. This pattern of results was also found in a second experiment in which the no-pen condition was replaced by a situation in which participants held a pen in their lips ("pen-in-lips" condition). These results suggested that facial muscular activity alters the recognition of not only facial expressions but also bodily expressions.

中文翻译：

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当我微笑时，您的脸和动作看起来会更快乐。

在这个实验中，我们复制了肌肉参与对感知的影响，使得他人面部表情的识别受到观察者面部肌肉活动的影响（Blaesi＆Wilson，2010）。我们扩展了这种复制，以表明还观察到了这种调节作用，可以识别动态身体表达。通过多实验室和受试者内部方法，我们研究了当受试者牙齿是否握笔时，点光生物助行器的情感识别以及变脸刺激。与“无牙签”条件相比，在“牙签”条件下，参与者倾向于降低面部刺激中快乐表情表达的感知阈值，从而重复了Blaesi和Wilson（2010）的实验。对于生物运动刺激，发现了类似的效果，因此与无笔状态相比，参与者降低了自己的阈值以感知在笔上状态下快乐的步行者。在第二个实验中也发现了这种结果模式，在该实验中，无笔情况被参与者用笔握住嘴唇的情况（“笔中笔”的情况）代替。这些结果表明面部肌肉活动不仅改变了面部表情的识别，而且还改变了身体表情的识别。在第二个实验中也发现了这种结果模式，在该实验中，无笔情况被参与者用笔握住嘴唇的情况（“笔中笔”的情况）代替。这些结果表明面部肌肉活动不仅改变了面部表情的识别，而且还改变了身体表情的识别。在第二个实验中也发现了这种结果模式，在该实验中，无笔情况被参与者用笔握住嘴唇的情况（“笔中笔”的情况）代替。这些结果表明面部肌肉活动不仅改变了面部表情的识别，而且还改变了身体表情的识别。