People routinely shift between direct and indirect speech in everyday communication. The factors that impact the selection between these two modes of reporting during language production are under-investigated. The present study examined how utterance-related factors (the vividness of non-verbal information and the utterance type) influence the use of direct and indirect reported speech in narratives. Participants were asked to watch and retell four movie clips. All narratives were videotaped and then transcribed verbatim for analyses. The data were analyzed using a mixed effects logistic regression model. The results showed that the utterances accompanied by vivid voice were more likely to be reported in direct speech. The vividness of facial expressions did not influence the form in which utterances were reported. In addition, we found that utterances that belonged to so-called Main Clause Phenomena were more likely to be reported in direct speech than in indirect speech. The current study helps us further understand the factors that influence structure choices during language production.

中文翻译：

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话语相关因素对直接和间接言语使用的影响

人们在日常交流中经常在直接和间接言语之间转换。在语言生产过程中影响这两种报告模式选择的因素尚未得到充分研究。本研究检验了话语相关因素（非语言信息的生动程度和话语类型）如何影响叙事中直接和间接报告的话语的使用。参与者被要求观看并复述四个电影片段。所有叙述都被录像，然后逐字转录以供分析。使用混合效应逻辑回归模型分析数据。结果表明，带有生动声音的话语更有可能在直接引语中被报道。面部表情的生动程度不影响话语报告的形式。此外，我们发现属于所谓的主句现象的话语在直接引语中比在间接引语中更容易被报道。目前的研究有助于我们进一步了解影响语言生产过程中结构选择的因素。