Reasons to Stay is a suicide prevention project reaching people at difficult moments through anonymous letters written by volunteers. Each letter on this site was written by a real person and delivere...

UNICEF France – janvier 2026

Background: This study aims to detect self-harm or suicide (SH-S) ideation language used by youth (aged 13-21 y) in their private Instagram (Meta) conversations. While automated #MentalHealth tools have shown promise, there remains a gap in understanding how nuanced youth language around SH-S can be effectively identified. Objective: Our work aimed to develop interpretable models that go beyond binary classification to recognize the spectrum of SH-S expressions. Methods: We analyzed a dataset of Instagram private conversations donated by youth. A range of traditional machine learning models (support vector machine, random forest, Naive Bayes, and extreme gradient boosting) and transformer-based architectures (Bidirectional Encoder Representations from Transformers and Distilled Bidirectional Encoder Representations from Transformers) were trained and evaluated. In addition to raw text, we incorporated contextual, psycholinguistic (linguistic injury word count), sentiment (Valence Aware Dictionary and Sentiment Reasoner), and lexical (term frequency–inverse document frequency) features to improve detection accuracy. We further explored how increasing conversational context—from message-level to subconversation level—affected model performance. Results: Distilled Bidirectional Encoder Representations from Transformers demonstrated a good performance in identifying the presence of SH-S behaviors within individual messages, achieving an accuracy of 99%. However, when tasked with a more fine-grained classification—differentiating among “self” (personal accounts of SH-S), “other” (references to SH-S experiences involving others), and “hyperbole” (sarcastic, humorous, or exaggerated mentions not indicative of genuine risk)—the model’s accuracy declined to 89%. Notably, by expanding the input window to include a broader conversational context, the model’s performance on these granular categories improved to 91%, highlighting the importance of contextual understanding when distinguishing between subtle variations in SH-S discourse. Conclusions: Our findings underscore the importance of designing SH-S automatic detection systems sensitive to the dynamic language of youth and #SocialMedia #SoMe #hcsm. Contextual and sentiment-aware models improve detection and provide a nuanced understanding of SH-S risk expression. This research lays the foundation for developing inclusive and ethically grounded interventions, while also calling for future work to validate these models across platforms and populations.

YouTube video by Matt Jarvis- The Amber Valley Poet

Reasons to Stay is a suicide prevention project reaching people at difficult moments through anonymous letters written by volunteers. Each letter on this site was written by a real person and delivere...

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