| Creators: |
Jechle, Deinera and Faußer, Stefan A. and Gewald, Heiko |
| Title: |
Lies or Nerves? A Signal Detection Theory-Guided Approach to Deception Detection in Natural Speech |
| Item Type: |
Conference or Workshop Item |
| Event Title: |
9th International Conference on Information Technology & Systems (ICITS) |
| Event Location: |
Roatán Island, Honduras |
| Event Dates: |
February, 16-18, 2026 |
| Projects: |
IDI |
| Paper No. / Type of Paper: |
312 / Full Paper |
| Date: |
February 2026 |
| Divisions: |
Informationsmanagement |
| Abstract (ENG): |
The automated identification of deceptive human behavior is a longstanding research endeavor. A major challenge for detection is to distinguish between liars and truthful but nervous individuals, as the subconscious human cues are very similar. Misclassifications are the unwanted consequences. This Design Science Research study applies Signal Detection Theory (SDT) as an explanatory kernel theory to design and evaluate an AI-based artifact for automated deception detection. Using a specifically created dataset and a controlled evaluation set of truthful but nervous speech, a support vector machine classifier was trained on acoustic-prosodic and spectral features to distinguish deceptive intent from nervousness. The artifact achieved a training accuracy of 76.6% in detecting deception and a false alarm rate of 6.25% for nervous-but-truthful cases. The findings demonstrate that SDT-guided design reduces bias, improves fairness, and enhances the applicability of speech-based analytics in sensitivedecision-making domains. |
| Forthcoming: |
Yes |
| Language: |
English |
| Uncontrolled Keywords: |
signal detection theory; design science research; deception detection; speech analytics; machine learning |
| Citation: |
Jechle, Deinera and Faußer, Stefan A. and Gewald, Heiko
(2026)
Lies or Nerves? A Signal Detection Theory-Guided Approach to Deception Detection in Natural Speech.
In: 9th International Conference on Information Technology & Systems (ICITS), February, 16-18, 2026, Roatán Island, Honduras, Paper 312 / Full Paper.
(Lecture Notes in Networks and Systems).
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