Zongxia/answer_equivalence_distilbert

QA-Evaluation-Metrics

QA-Evaluation-Metrics is a fast and lightweight Python package for evaluating question-answering models and prompting of black-box and open-source large language models. It provides various basic and efficient metrics to assess the performance of QA models.

Updates

• Uopdated to version 0.2.8
  • Supports prompting OPENAI GPT-series models and Claude Series models now. (Assuimg OPENAI version > 1.0)
  • Supports prompting various open source models such as LLaMA-2-70B-chat, LLaVA-1.5 etc by calling API from deepinfra.

Installation

• Python version >= 3.6
• openai version >= 1.0

To install the package, run the following command:

pip install qa-metrics

Usage/Logistics

The python package currently provides six QA evaluation methods.

• Given a set of gold answers, a candidate answer to be evaluated, and a question (if applicable), the evaluation returns True if the candidate answer matches any one of the gold answer, False otherwise.
• Different evaluation methods have distinct strictness of evaluating the correctness of a candidate answer. Some have higher correlation with human judgments than others.
• Normalized Exact Match and Question/Answer type Evaluation are the most efficient method. They are suitable for short-form QA datasets such as NQ-OPEN, Hotpot QA, TriviaQA, SQuAD, etc.
• Question/Answer Type Evaluation and Transformer Neural evaluations are cost free and suitable for short-form and longer-form QA datasets. They have higher correlation with human judgments than exact match and F1 score when the length of the gold and candidate answers become long.
• Black-box LLM evaluations are closest to human evaluations, and they are not cost-free.

Normalized Exact Match

em_match

Returns a boolean indicating whether there are any exact normalized matches between gold and candidate answers.

Parameters

• reference_answer (list of str): A list of gold (correct) answers to the question.
• candidate_answer (str): The answer provided by a candidate that needs to be evaluated.

Returns

• boolean: A boolean True/False signifying matches between reference or candidate answers.

from qa_metrics.em import em_match

reference_answer = ["The Frog Prince", "The Princess and the Frog"]
candidate_answer = "The movie \"The Princess and the Frog\" is loosely based off the Brother Grimm's \"Iron Henry\""
match_result = em_match(reference_answer, candidate_answer)
print("Exact Match: ", match_result)
'''
Exact Match:  False
'''

F1 Score

f1_score_with_precision_recall

Calculates F1 score, precision, and recall between a reference and a candidate answer.

Parameters

• reference_answer (str): A gold (correct) answers to the question.
• candidate_answer (str): The answer provided by a candidate that needs to be evaluated.

Returns

• dictionary: A dictionary containing the F1 score, precision, and recall between a gold and candidate answer.

from qa_metrics.f1 import f1_match,f1_score_with_precision_recall

f1_stats = f1_score_with_precision_recall(reference_answer[0], candidate_answer)
print("F1 stats: ", f1_stats)
'''
F1 stats:  {'f1': 0.25, 'precision': 0.6666666666666666, 'recall': 0.15384615384615385}
'''

match_result = f1_match(reference_answer, candidate_answer, threshold=0.5)
print("F1 Match: ", match_result)
'''
F1 Match:  False
'''

Efficient and Robust Question/Answer Type Evaluation

1. get_highest_score

Returns the gold answer and candidate answer pair that has the highest matching score. This function is useful for evaluating the closest match to a given candidate response based on a list of reference answers.

Parameters

• reference_answer (list of str): A list of gold (correct) answers to the question.
• candidate_answer (str): The answer provided by a candidate that needs to be evaluated.
• question (str): The question for which the answers are being evaluated.

Returns

• dictionary: A dictionary containing the gold answer and candidate answer that have the highest matching score.

2. get_scores

Returns all the gold answer and candidate answer pairs' matching scores.

Parameters

• reference_answer (list of str): A list of gold (correct) answers to the question.
• candidate_answer (str): The answer provided by a candidate that needs to be evaluated.
• question (str): The question for which the answers are being evaluated.

Returns

• dictionary: A dictionary containing gold answers and the candidate answer's matching score.

3. evaluate

Returns True if the candidate answer is a match of any of the gold answers.

Parameters

• reference_answer (list of str): A list of gold (correct) answers to the question.
• candidate_answer (str): The answer provided by a candidate that needs to be evaluated.
• question (str): The question for which the answers are being evaluated.

Returns

• boolean: A boolean True/False signifying matches between reference or candidate answers.

from qa_metrics.pedant import PEDANT

question = "Which movie is loosley based off the Brother Grimm's Iron Henry?"
pedant = PEDANT()
scores = pedant.get_scores(reference_answer, candidate_answer, question)
max_pair, highest_scores = pedant.get_highest_score(reference_answer, candidate_answer, question)
match_result = pedant.evaluate(reference_answer, candidate_answer, question)
print("Max Pair: %s; Highest Score: %s" % (max_pair, highest_scores))
print("Score: %s; PANDA Match: %s" % (scores, match_result))
'''
Max Pair: ('the princess and the frog', 'The movie "The Princess and the Frog" is loosely based off the Brother Grimm\'s "Iron Henry"'); Highest Score: 0.854451712151719
Score: {'the frog prince': {'The movie "The Princess and the Frog" is loosely based off the Brother Grimm\'s "Iron Henry"': 0.7131625951317375}, 'the princess and the frog': {'The movie "The Princess and the Frog" is loosely based off the Brother Grimm\'s "Iron Henry"': 0.854451712151719}}; PANDA Match: True
'''

print(pedant.get_score(reference_answer[1], candidate_answer, question))
'''
0.7122460127464126
'''

Transformer Neural Evaluation

Our fine-tuned BERT model is on 🤗 Huggingface. Our Package also supports downloading and matching directly. distilroberta, distilbert, roberta, and roberta-large are also supported now! 🔥🔥🔥

transformer_match

Returns True if the candidate answer is a match of any of the gold answers.

Parameters

• reference_answer (list of str): A list of gold (correct) answers to the question.
• candidate_answer (str): The answer provided by a candidate that needs to be evaluated.
• question (str): The question for which the answers are being evaluated.

Returns

• boolean: A boolean True/False signifying matches between reference or candidate answers.

from qa_metrics.transformerMatcher import TransformerMatcher

question = "Which movie is loosley based off the Brother Grimm's Iron Henry?"
# Supported models: roberta-large, roberta, bert, distilbert, distilroberta
tm = TransformerMatcher("roberta-large")
scores = tm.get_scores(reference_answer, candidate_answer, question)
match_result = tm.transformer_match(reference_answer, candidate_answer, question)
print("Score: %s; bert Match: %s" % (scores, match_result))
'''
Score: {'The Frog Prince': {'The movie "The Princess and the Frog" is loosely based off the Brother Grimm\'s "Iron Henry"': 0.6934309}, 'The Princess and the Frog': {'The movie "The Princess and the Frog" is loosely based off the Brother Grimm\'s "Iron Henry"': 0.7400551}}; TM Match: True
'''

Prompting LLM For Evaluation

Note: The prompting function can be used for any prompting purposes.

OpenAI

from qa_metrics.prompt_llm import CloseLLM
model = CloseLLM()
model.set_openai_api_key(YOUR_OPENAI_KEY)
prompt = 'question: What is the Capital of France?\nreference: Paris\ncandidate: The capital is Paris\nIs the candidate answer correct based on the question and reference answer? Please only output correct or incorrect.'
model.prompt_gpt(prompt=prompt, model_engine='gpt-3.5-turbo', temperature=0.1, max_tokens=10)

'''
'correct'
'''

Anthropic

model = CloseLLM()
model.set_anthropic_api_key(YOUR_Anthropic_KEY)
model.prompt_claude(prompt=prompt, model_engine='claude-v1', anthropic_version="2023-06-01", max_tokens_to_sample=100, temperature=0.7)

'''
'correct'
'''

deepinfra (See below for descriptions of more models)

from qa_metrics.prompt_open_llm import OpenLLM
model = OpenLLM()
model.set_deepinfra_key(YOUR_DEEPINFRA_KEY)
model.prompt(message=prompt, model_engine='mistralai/Mixtral-8x7B-Instruct-v0.1', temperature=0.1, max_tokens=10)

'''
'correct'
'''

If you find this repo avialable, please cite our paper:

@misc{li2024panda,
      title={PANDA (Pedantic ANswer-correctness Determination and Adjudication):Improving Automatic Evaluation for Question Answering and Text Generation}, 
      author={Zongxia Li and Ishani Mondal and Yijun Liang and Huy Nghiem and Jordan Lee Boyd-Graber},
      year={2024},
      eprint={2402.11161},
      archivePrefix={arXiv},
      primaryClass={cs.CL}
}

Updates

• [01/24/24] 🔥 The full paper is uploaded and can be accessed here. The dataset is expanded and leaderboard is updated.
• Our Training Dataset is adapted and augmented from Bulian et al. Our dataset repo includes the augmented training set and QA evaluation testing sets discussed in our paper.
• Now our model supports distilroberta, distilbert, a smaller and more robust matching model than Bert!

License

This project is licensed under the MIT License - see the LICENSE file for details.

Contact

For any additional questions or comments, please contact [zli12321@umd.edu].