Detecting Concealed Information in Text and Speech

Shengli Hu


Abstract
Motivated by infamous cheating scandals in the media industry, the wine industry, and political campaigns, we address the problem of detecting concealed information in technical settings. In this work, we explore acoustic-prosodic and linguistic indicators of information concealment by collecting a unique corpus of professionals practicing for oral exams while concealing information. We reveal subtle signs of concealing information in speech and text, compare and contrast them with those in deception detection literature, uncovering the link between concealing information and deception. We then present a series of experiments that automatically detect concealed information from text and speech. We compare the use of acoustic-prosodic, linguistic, and individual feature sets, using different machine learning models. Finally, we present a multi-task learning framework with acoustic, linguistic, and individual features, that outperforms human performance by over 15%.
Anthology ID:
P19-1039
Volume:
Proceedings of the 57th Annual Meeting of the Association for Computational Linguistics
Month:
July
Year:
2019
Address:
Florence, Italy
Venue:
ACL
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
402–412
Language:
URL:
https://aclanthology.org/P19-1039
DOI:
10.18653/v1/P19-1039
Bibkey:
Cite (ACL):
Shengli Hu. 2019. Detecting Concealed Information in Text and Speech. In Proceedings of the 57th Annual Meeting of the Association for Computational Linguistics, pages 402–412, Florence, Italy. Association for Computational Linguistics.
Cite (Informal):
Detecting Concealed Information in Text and Speech (Hu, ACL 2019)
Copy Citation:
PDF:
https://aclanthology.org/P19-1039.pdf