BERT Coverage Assessment Model

🎯 A domain-agnostic BERT model for assessing educational conversation coverage

Model Description

This model fine-tunes BERT for educational coverage assessment, predicting how well student conversations address learning objectives. It achieves 0.865 Pearson correlation with coverage assessments, making it suitable for real-time educational applications.

Key Features

🌍 Domain-agnostic: Works across subjects without retraining
📊 Continuous scoring: Outputs 0.0-1.0 coverage scores
⚡ Real-time capable: Fast inference for live systems
🎓 Research-validated: Exceeds academic benchmarks

Performance

Metric	Value
Pearson Correlation	0.8650
R-squared	0.7490
Mean Absolute Error	0.1330
RMSE	0.165

Usage

from transformers import AutoTokenizer
import torch
import torch.nn as nn
from transformers import AutoModel

class BERTCoverageRegressor(nn.Module):
    def __init__(self, model_name='bert-base-uncased', dropout_rate=0.3):
        super(BERTCoverageRegressor, self).__init__()
        self.bert = AutoModel.from_pretrained(model_name)
        self.dropout = nn.Dropout(dropout_rate)
        self.regressor = nn.Linear(self.bert.config.hidden_size, 1)
        
    def forward(self, input_ids, attention_mask):
        outputs = self.bert(input_ids=input_ids, attention_mask=attention_mask)
        pooled_output = outputs.pooler_output
        output = self.dropout(pooled_output)
        return self.regressor(output)

# Load model and tokenizer
tokenizer = AutoTokenizer.from_pretrained('KingTechnician/bert-osmosis-coverage')
model = BERTCoverageRegressor()

# Load the fine-tuned weights
model_path = "pytorch_model.bin"  # Download from repo
model.load_state_dict(torch.load(model_path, map_location='cpu'))
model.eval()

# Make prediction
def predict_coverage(objective, conversation, max_length=512):
    encoding = tokenizer(
        objective,
        conversation,
        truncation=True,
        padding='max_length',
        max_length=max_length,
        return_tensors='pt'
    )
    
    with torch.no_grad():
        output = model(encoding['input_ids'], encoding['attention_mask'])
        score = torch.clamp(output.squeeze(), 0.0, 1.0).item()
    
    return score

# Example usage
objective = "Understand the process of photosynthesis"
conversation = "Student explains light reactions and Calvin cycle with examples..."
coverage_score = predict_coverage(objective, conversation)
print(f"Coverage Score: {coverage_score:.3f}")

Input Format

The model expects input in the format:

[CLS] learning_objective [SEP] student_conversation [SEP]

Output

Returns a continuous score between 0.0 and 1.0:

0.0-0.2: Minimal coverage
0.3-0.4: Low coverage
0.5-0.6: Moderate coverage
0.7-0.8: High coverage
0.9-1.0: Complete coverage

Training Data

Trained on synthetic educational conversations across multiple domains:

Computer Science (algorithms, data structures)
Statistics (hypothesis testing, regression)
Multi-domain conversations

Research Background

This model implements the methodology from research on domain-agnostic educational assessment, achieving significant improvements over traditional similarity-based approaches:

269% improvement over baseline similarity features
Domain transfer capability without retraining
Real-time processing under 100ms per assessment

Limitations

Trained primarily on synthetic data (validation on real conversations recommended)
Optimized for English language conversations
Performance may vary for highly specialized technical domains

Citation

If you use this model in your research, please cite:

@misc{bert-coverage-assessment,
  title={Domain-Agnostic Coverage Assessment Through BERT Fine-tuning},
  author={Your Name},
  year={2025},
  url={https://huggingface.co/KingTechnician/bert-osmosis-coverage}
}

Contact

For questions or collaborations, please open an issue in the model repository.

Model Type: Educational AI | Task: Coverage Assessment | Performance: r=0.865

KingTechnician
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bert-osmosis-coverage