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Published on: December 23, 2025
The engagement-validation loop: Sycophancy, anthropomorphic projection, and clinical risk in informal AI-based mental
Bruno da Silva Santos1, Thiago Henrique Roza2, Ives Cavalcante Passos1
1Laboratory of Molecular Psychiatry, Postgraduate Programme in Psychiatry and Behavioural Sciences, Hospital de Clínicas de Porto Alegre (HCPA), Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil; National Institute of Translational Science and Technology in Digital Mental Health (INCT-SMD), Porto Alegre, Rio Grande do Sul, Brazil.
Abstract:
Approximately one billion people worldwide live with a mental disorder, yet access to minimally adequate treatment remains low. Against this backdrop, general-purpose generative artificial intelligence (GenAI) systems have rapidly expanded into informal mental health support. OpenAI disclosed that roughly 1.2 million ChatGPT users weekly display indicators of suicidal planning or intent, and meta-analytic evidence supports modest efficacy for AI chatbots in reducing common mental health symptoms. Nevertheless, these tools may pose substantial clinical risks for vulnerable individuals. Two interlocking mechanisms-algorithmic sycophancy and anthropomorphic projection-converge to produce self-reinforcing engagement-validation loops capable of reinforcing maladaptive beliefs and contributing to clinical risk. Structural investment in mental-health workforce capacity must remain the foundation of future responses to the global treatment gap, with GenAI deployed as a supervised adjunct to clinicians within hybrid stepped-care frameworks subject to independent safety evaluation, transparent disclosure obligations, and regulatory oversight proportional to clinical risk.
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