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DWI SANTOSO
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Cognitive Load and Deceptive Speech in Anti-Corruption Interrogations: An Activation Decision Construction Perspective Santoso, DWi
Global Synthesis in Education Journal Vol. 3 No. 3 (2025): Vol. 3 No. 3, November 2025
Publisher : Mutiara Intelektual Indonesia Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61667/bb7mv332

Abstract

Detecting deception in institutional interrogations remains a significant challenge for law enforcement and investigative agencies. This study investigates the relationship between cognitive load and deceptive speech in anti-corruption interrogations through a modified Activation–Decision–Construction Model (ADCM) that incorporates iterative cognitive processing. The modified ADCM posits that truth-telling and deception engage qualitatively distinct cognitive pathways: Direct Truth Path (rapid veridical information access), Strategic Lie Path (deliberate false-narrative construction), and Iterative Lie-Construction Path (multiple cycles of cognitive revision and backtracking). We hypothesized that these pathways would be distinguishable through acoustic-linguistic markers reflecting differential cognitive load. The study analyzed 102 question-answer segments from 15 speakers across 12 authentic anti-corruption interrogations in Indonesian. For each segment, we measured normalized fundamental frequency (F0), pause frequency and duration, reaction time (RT), and assigned ADCM-phase classifications via temporal coding. Segments were independently verified as Likely Truthful, Likely Deceptive, or Ambiguous based on corroborating evidence obtained during investigations. Results demonstrate that Likely Deceptive segments exhibited significantly elevated F0 (mean z-score +0.52 vs. –0.38 for truthful; d = 0.90), increased pause frequency (3.8 vs. 1.5 pauses; t = 8.34, p < .001), prolonged total pause duration (2.1 vs. 0.6 seconds; t = 9.12, p < .001), and extended RT (2.8 vs. 1.2 seconds; t = 7.89, p < .001). The Iterative Lie-Construction Path predominated in deceptive segments (47%), while the Direct Truth Path dominated truthful segments (76%). These findings provide strong empirical support for the modified ADCM and demonstrate that cognitive load in deceptive speech is reliably indexed through convergent acoustic-linguistic markers. The results have implications for evidence-based interrogation practice and deception detection in institutional settings
Co-Authors Abdul Rahim Adi Sutrisno Aditya Murtilaksono Adiwena, Muh Agang, Mohammad Wahyu Agang, MW Agus Sumanto Ahmad Mubarak, Ahmad Amalia, Anugerah Fitri Amaliawati, Shafira Amarullah Arbain, Muhammad Arpandi, Ahril Aulia, Wella Ayu, Hanifah Banyuriatiga Banyuriatiga CCW, Dewi Elviana Dewa, R.Djayendra Djunarsjah, Eka Egra, Saat Elida Novita Erna Setiany etiadi, Iwan S FATIMA, SITI Hadi Santoso Harlina Meidiaswati Hasanah, Fatiatul Hendris Hendris, Hendris Hermawanto, Kiki Noventri Herwani . Hidaya, Nurman Imam Fatoni, Khoirul Insani, Yogie Dana Iswandi, R. Marsuki Iwan Setiadi Juwita, Nanda Elok Kadarsih Kadarsih, Kadarsih Kalbuana, Nawang Khaerunnisa Khaerunnisa, Khaerunnisa Kusmiah, Nurhaya Kusnadi, Erwan Mawaddah, Suci Mi’raj Fuadi Mu'arofah, Alfiyah Mulyadi Mulyadi Mumpuni Anggrayni, Irra Murdianto, Deny Nasikh Nurdin, Muhammad Firdan Nurfitria , Ratu Shafira Nurul Pramulya, Rahmat Puspitasari, Noviana Rahma, Naura Alifa Ridwan, Rasmawati Sari, Herla Lukmana sari, Nove Kurnianti Sayaza, Mas Davino Setiyadi , Johar Shinta Tri Kismanti Silalahi, Prayoga Raja Lambok Sudirman Sudirman Sukarsih Sulistyo, Anang Surya Abdul Muttalib, Surya Abdul Sutadipraja, Marista Winanti Syamsudin Syamsudin Syamsudin, S Tanjung, Hery Bachrizal Titik Purwanti Titing, Deny Tjahjo Tri Hartono Tri Sulistyarini Usmany , Janneman Wahyuni, Etty Waluyo, Marhadi Budi Wardatullatifah, Ince Siti Weka Gusmiarty Abdullah, Weka Gusmiarty Wisnumurti . Zulhafandi Zulhafandi, Zulhafandi