---
license: cc-by-nc-4.0
language:
- en
tags:
- bert
- question-classification
- trec
widget:
  - text: |
      Enter your question here to classify its type.
    example_title: "Classify Question Type"
---

# BERT-Question-Classifier

The BERT-Question-Classifier is a refined model based on the `bert-base-uncased` architecture. It has been fine-tuned specifically for classifying the types of questions entered (Description, Entity, Expression, Human, Location, Numeric) using the TREC question classification dataset.

- **Developed by**: phanerozoic
- **Model type**: BertForSequenceClassification
- **Source model**: `bert-base-uncased`
- **License**: cc-by-nc-4.0
- **Languages**: English

## Model Details

The BERT-Question-Classifier utilizes a self-attention mechanism to assess the relevance of each word in the context of a question, optimized for categorizing question types.

### Configuration
- **Attention probs dropout prob**: 0.1
- **Hidden act**: gelu
- **Hidden size**: 768
- **Number of attention heads**: 12
- **Number of hidden layers**: 12

## Training and Evaluation Data

This model is trained on the TREC dataset, which contains a diverse set of question types each labeled under categories such as Description, Entity, Expression, Human, Location, and Numeric.

## Training Procedure

The training process was systematically automated to evaluate various hyperparameters, ensuring the selection of optimal settings for the best model performance.

- **Initial exploratory training**: Various configurations of epochs, batch sizes, and learning rates were tested.
- **Focused refinement training**: Post initial testing, the model underwent intensive training with selected hyperparameters to ensure consistent performance and generalization.

### Optimal Hyperparameters Identified
- **Epochs**: 5
- **Batch size**: 48
- **Learning rate**: 2e-5

### Performance
Post-refinement, the model exhibits high efficacy in question type classification:
- **Accuracy**: 91%
- **F1 Score**: 92%

## Usage

This model excels in classifying question types in English, ideal for systems needing to interpret and categorize user queries accurately.

## Limitations

The BERT-Question-Classifier performs best on question data similar to that found in the TREC dataset. Performance may vary when applied to different domains or languages.

## Acknowledgments

Special thanks to the developers of the BERT architecture and the contributions from the Hugging Face team, whose tools and libraries were crucial in the development of this classifier.