Identifying Deceptive Speech Across Cultures
Technical Report,15 Sep 2011,14 May 2016
Trustees of Columbia University New United States
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We have completed our collection of deceptive and non-deceptive speech recorded from interviews between native speaker of Mandarin and of English instructed to answer truthfully or to lie about 24 biographical questions. Subjects were rewarded or penalized financially for their ability to lie interviewee or to distinguish truth from lie interviewer each subject acted both roles. At 125h 174 subjects, this is by far the largest cleanly recorded speech corpus of its kind. From this data, we find that ability to lie is significantly correlated with ability to detect deception. We also find significant correlations of deception ability with personality factors extraversion, conscientiousness. Using acoustic-prosodic features, gender, ethnicity and personality information our machine learning experiments can classify truth vs. lie in our data with 65 accuracy we expect better results when we include lexical features.