---
title: "Profiling Psychopathic Behavior Using Machine Learning (2026)"
description: "The authors ask whether speech transcripts can reveal psychopathic traits, offering a screening aid that does… 81% accuracy. 43 references."
authors: ["Avi Treistman", "Tehilla David", "Sivan Levi", "Dror Mughaz"]
year: 2026
venue: "Proceedings of the Sixth Resources and ProcessIng of linguistic, para-linguistic and extra-linguistic Data from people with various forms of cognitive/psychiatric/developmental impairments in cooperation with the MENTAL.ai consortium"
source: "https://aclanthology.org/2026.rapid-1.10/"
doi: "10.63317/2rto98ehmp4d"
licence: "CC BY-NC 4.0 (ELRA, LREC proceedings)"
licence_url: "https://creativecommons.org/licenses/by-nc/4.0/"
summary_licence: "Elamur Cosmic License"
canonical: "https://research.elamur.ai/free/en/papers/treistman-2026-profiling-psychopathic-behavior-machine-learning/"
---
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# Profiling Psychopathic Behavior Using Machine Learning

**Authors:** Avi Treistman, Tehilla David, Sivan Levi and Dror Mughaz · **Year:** 2026 · **Venue:** [Proceedings of the Sixth Resources and ProcessIng of linguistic, para-linguistic and extra-linguistic Data from people with various forms of cognitive/psychiatric/developmental impairments in cooperation with the MENTAL.ai consortium](https://md.research.elamur.ai/free/en/venues/rapid/) ([Resources and ProcessIng of linguistic, para-linguistic and extra-linguistic Data from people with various forms of cognitive/psychiatric/developmental impairments in cooperation with the MENTAL.ai consortium 2026](https://md.research.elamur.ai/free/en/venues/rapid/2026/)) · **Publisher:** [European Language Resources Association (ELRA)](https://md.research.elamur.ai/free/en/publishers/european-language-resources-association-elra/) · **Licence:** [CC BY-NC 4.0 (ELRA, LREC proceedings)](https://creativecommons.org/licenses/by-nc/4.0/)

**Links:** [Publisher's page](https://aclanthology.org/2026.rapid-1.10/) · [PDF](https://aclanthology.org/2026.rapid-1.10.pdf) · [DOI 10.63317/2rto98ehmp4d](https://doi.org/10.63317/2rto98ehmp4d) · [OpenAlex](https://openalex.org/W7166530768)

**Citations:** 0 citations (OpenAlex, 2026-10-14)

## Summary
The authors ask whether speech transcripts can reveal psychopathic traits, offering a screening aid that does not rely on clinical interviews alone, which are hard to scale and vulnerable to manipulation. They built an English corpus that contrasts interviews with confirmed criminal psychopaths, taken from YouTube, against a control group drawn from NPR interviews. Both sets were cleaned under shared annotation rules to minimise stylistic differences between sources. Instead of using the full vocabulary, they started from a hand-picked list of psychologically meaningful words. They expanded it with DyVaT, an embedding-based method that discards noisy high-variance dimensions, producing a compact lexicon. Texts were split into fixed-size chunks, lemmatized, vectorised with TF-IDF, and the minority class was enlarged through synonym substitution. Of three classical classifiers, a Linear SVM performed best, reaching roughly 81% accuracy. Inspecting feature weights exposed interpretable lexical contrasts between the groups. The work matters as an interpretable baseline for a domain where data is scarce and sensitive. It also flags ethical, bias, and privacy concerns for forensic and clinical deployment.

## Key points
- **Data:** The psychopathic class comes from about 77 YouTube interviews with legally and psychologically confirmed criminal psychopaths. Controls come from NPR interviews matched in conversational style. Transcripts were segmented into standardized 15-sentence chunks.
- **Features:** Using Treistman et al.'s (2022) DyVaT (Dynamic Variance Thresholding) method, a manually built seed list was grown into a lexicon of about 1,357 features. DyVaT uses the kneedle method to choose a cut-off and keeps the low-variance embedding dimensions.
- **Models and results:** Logistic Regression, Random Forest and Linear SVM were compared. The Linear SVM won with an F1 of 0.7957. Its accuracy is reported as 0.8081 in the abstract and introduction but as 0.8031 in the concluding summary.
- **Linguistic findings:** Psychopaths' speech leaned more on basic-need words (money, food, sex) and on violence, dominance and authority vocabulary. Controls used more words tied to social bonds, norms and morality.
- **Limitations:** The dataset is small and English-only, uses text without paralinguistic cues, comes from heterogeneous and partly censored sources, and rests on a contested definition of psychopathy. Planned extensions include LLMs, transformers, multilingual data and multimodal (audio/video) input.

*Our summary of the paper, in our own words — not its text. The work belongs to its authors; read it at the links above.*

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- [Jerusalem College of Technology](https://md.research.elamur.ai/free/en/universities/jerusalem-college-of-technology/) — University, Jerusalem, Israel · 13 works · 147 citations

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## Cite

Cite as: Avi Treistman, Tehilla David, Sivan Levi and Dror Mughaz. 2026. Profiling Psychopathic Behavior Using Machine Learning. Proceedings of the Sixth Resources and ProcessIng of linguistic, para-linguistic and extra-linguistic Data from people with various forms of cognitive/psychiatric/developmental impairments in cooperation with the MENTAL.ai consortium.

The paper itself, not this page. BibTeX from the library's record of the work.

```bibtex
@inproceedings{treistman2026profiling,
  title = {{Profiling Psychopathic Behavior Using Machine Learning}},
  author = {Avi Treistman, Tehilla David, Sivan Levi and Dror Mughaz},
  booktitle = {Proceedings of the Sixth Resources and ProcessIng of linguistic, para-linguistic and extra-linguistic Data from people with various forms of cognitive/psychiatric/developmental impairments in cooperation with the MENTAL.ai consortium},
  year = {2026},
  doi = {10.63317/2rto98ehmp4d},
  url = {https://doi.org/10.63317/2rto98ehmp4d}
}
```

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*Updated 1 November 2026*