Theories of vocal signalling in humans typically only consider communication within the interactive group and ignore intergroup dynamics. Recent work has found that colaughter generated between pairs of people in conversation can afford accurate judgements of affiliation across widely disparate cultures, and the acoustic features that listeners use to make these judgements are linked to speaker arousal. But to what extent does colaughter inform third party listeners beyond other dynamic information between interlocutors such as overlapping talk? We presented listeners with short segments (1–3 s) of colaughter and simultaneous speech (i.e. cospeech) taken from natural conversations between established friends and newly acquainted strangers. Participants judged whether the pairs of interactants in the segments were friends or strangers. Colaughter afforded more accurate judgements of affiliation than did cospeech, despite cospeech being over twice in duration relative to colaughter on average. Sped-up versions of colaughter and cospeech (proxies of speaker arousal) did not improve accuracy for either identifying friends or strangers, but faster versions of both modes increased the likelihood of tokens being judged as being between friends. Overall, results are consistent with research showing that laughter is well suited to transmit rich information about social relationships to third party overhearers—a signal that works between, and not just within conversational groups.

人类中的语音信号理论通常只考虑交互式小组内的交流，而忽略小组间的动态。最近的工作发现，在对话中成对的人之间产生的col窃可以对跨完全不同的文化的从属关系做出准确的判断，并且听众用来做出这些判断的声学特征与说话者的唤醒有关。但是，在对话者之间的其他动态信息（例如重叠讲话）之外，同谋会在多大程度上告知第三方听众？我们为听众提供了短时（1-3 s）的自嘲，同时还有既定朋友和新认识的陌生人之间自然对话的同时讲话（即粗话）。参与者判断各部分中的一对互动者是朋友还是陌生人。尽管cospeech的持续时间平均比同等时间的两倍多，但与cospeech相比，coolaughter提供了更准确的从属关系判断。速成版的colaughter和cospeech（说话者唤醒的代理）并不能提高识别朋友或陌生人的准确性，但是两种模式的较快版本都增加了令牌被判断为朋友之间的可能性。总体而言，结果与研究一致，该研究表明笑声非常适合将有关社会关系的丰富信息传递给第三方监听者，这是一个在彼此之间交流的信号，而不仅仅是在对话群体内部。速成版的colaughter和cospeech（说话者唤醒的代理）并不能提高识别朋友或陌生人的准确性，但是两种模式的较快版本都增加了令牌被判断为朋友之间的可能性。总体而言，结果与研究一致，该研究表明笑声非常适合将有关社会关系的丰富信息传递给第三方监听者，这是一个在彼此之间交流的信号，而不仅仅是在对话群体内部。速成版的colaughter和cospeech（说话者唤醒的代理）并不能提高识别朋友或陌生人的准确性，但是两种模式的较快版本都增加了令牌被判断为朋友之间的可能性。总体而言，结果与研究一致，该研究表明笑声非常适合将有关社会关系的丰富信息传递给第三方监听者，这是一个在彼此之间交流的信号，而不仅仅是在对话群体内部。