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Causal indicators for assessing the truthfulness of child speech in forensic interviews

机译：评估法医访谈中儿童言论真实性的因果指标

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摘要

When interviewing a child who may have witnessed a crime, the interviewer must ask carefully directed questions in order to elicit a truthful statement from the child. The presented work uses Granger causal analysis to examine and represent child-interviewer interaction dynamics over such an interview. Our work demonstrates that Granger Causal analysis of psycholinguistic and acoustic signals from speech yields significant predictors of whether a child is telling the truth, as well as whether a child will disclose witnessing a transgression later in the interview. By incorporating cross-modal Granger causal features extracted from audio and transcripts of forensic interviews, we are able to substantially outperform conventional deception detection methods and a number of simulated baselines. Our results suggest that a child's use of concreteness and imageability in their language are strong psycholinguistic indicators of truth-telling and that the coordination of child and interviewer speech signals is much more informative than the specific language used throughout the interview.
机译：在采访可能已经见证犯罪的孩子时，面试官必须要求精心指导的问题，以引起儿童的真实陈述。所呈现的工作使用GRANGER因果分析来检查并代表儿童访客互动动态在此次采访中。我们的工作表明，来自语音的心理语言和声学信号的格兰杰因果分析产生了重要的预测因素，这些禁止儿童是否讲述真相，以及儿童是否会在面试后披露过违法行为。通过纳入从法医访谈的音频和成绩单中提取的跨模型格兰杰因果特征，我们能够大大优于传统的欺骗检测方法和许多模拟基线。我们的研究结果表明，孩子在他们的语言中使用具体性和想象力是强烈的精神语言指标的真理指标，并且儿童和面试官语音信号的协调比在整个面试中使用的特定语言更有信息。

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