VATT Crisis Detection: A Multimodal Crisis Stage Classification Model for Child and Adolescent Psychological Counseling

A multimodal deep learning system based on the VATT architecture, integrating audio and text data to achieve accurate identification and classification of crisis stages in child and adolescent psychological counseling sessions. It addresses the issues of lag and inconsistent standards in traditional subjective judgment relying on counselors' experience, providing objective auxiliary decision support for counselors.

Mental health issues among children and adolescents are receiving increasing social attention. Accurate identification of crisis stages in psychological counseling is crucial for timely intervention. Traditional assessments rely on clinical experience and subjective judgment, leading to problems such as delayed identification and inconsistent standards. The VATT-Crisis-Detection project proposes an innovative solution: using a multimodal deep learning model to analyze audio features and text content of counseling sessions, automatically identifying the severity and development stages of crises.

VATT (Video-Audio-Text Transformer) is a multimodal pre-trained model from Google Research, using a unified Transformer architecture to process video, audio, and text data. Core design points:

1. Modality-agnostic encoder: The same Transformer structure processes different modalities, projecting them into a shared embedding space to achieve true fusion;
2. Contrastive learning pre-training: Learns semantic associations through large-scale cross-modal alignment, with zero-shot transfer capability;
3. Computational efficiency optimization: Sparse attention mechanism and modality dropout strategy reduce inference costs.

Data Modalities and Feature Extraction

• Audio modality: Extract prosodic features (tone, speech rate, pauses) and non-verbal sounds; after converting to Mel spectrogram representations, use the VATT audio encoder to extract features;
• Text modality: After word segmentation of transcribed text, use the VATT text encoder to capture semantic and syntactic information.

Crisis Stage Definition

Using a clinically recognized model, it is divided into: Stable Period (emotional stability), Stress Period (acute stress response), Crisis Period (failure to cope, requiring intervention), High-Risk Period (self-harm/suicide risk, requiring emergency handling).

Multimodal Fusion Mechanism

1. Early fusion: After features are extracted by audio/text encoders, cross-attention in early layers fuses correlations (e.g., co-occurrence of sad tone and negative vocabulary);
2. Temporal modeling: Introduce temporal attention to capture the dynamic evolution of crises in sessions;
3. Classification head: After pooling the fused representation, input it into an MLP classifier to output a probability distribution.

Training Strategy

• Semi-supervised: Fine-tune the VATT backbone using public multimodal emotion datasets, and adapt to the domain with a small amount of labeled counseling data;
• Class balance: Use focal loss and resampling to handle the scarcity of high-risk samples.

Application Scenarios

• Counseling process monitoring: Real-time early warning of crisis escalation;
• Counseling quality assessment: Post-hoc analysis of counselors' responses;
• Research data annotation: Automatic labeling of crisis tags to support quantitative research.

Ethical Privacy

• Data desensitization: De-identification processing;
• Informed consent: Ensure authorization from data providers;
• Auxiliary positioning: Decision-making power remains with counselors;
• Fairness audit: Regularly evaluate group performance to prevent bias.

VATT-Crisis-Detection is a beneficial exploration of AI in the mental health field, improving the timeliness and accuracy of crisis identification. Its ethical privacy design sets an example for AI empowering mental health. Open-source contribution directions: Expand video modality, optimize lightweight deployment, verify cross-cultural generalization, and develop supporting management tools.