Assessing Biases in Large Language Models: A Comparative Study of Evaluation Methods and Model Performance

Tuesday 08 April 2025


As researchers continue to push the boundaries of artificial intelligence, a new study has shed light on the inherent biases that can be embedded in language models. The investigation, published in a recent paper, analyzed the performance of ten large language models (LLMs) on two tasks: generating stories and answering multiple-choice questions.


The study’s authors found that while LLMs are capable of producing impressive results, they are not immune to the biases that exist in human language. In fact, the models exhibited significant biases in their generation of stories, with certain categories such as political orientation and educational background receiving more attention than others.


One of the key findings was that LLMs tend to reinforce existing stereotypes and perpetuate harmful biases. For example, the models were more likely to generate stories featuring individuals from higher socioeconomic backgrounds or those who hold certain religious beliefs. This is concerning because it suggests that LLMs may not be able to provide a balanced representation of the world.


The study also explored how these biases manifest in different ways depending on the task. In story generation, the models were more likely to introduce bias through character descriptions, plot elements, and even dialogue. Meanwhile, when answering multiple-choice questions, the models tended to exhibit bias through their choice of answers or the language used to describe them.


The authors of the study noted that these biases are not necessarily intentional, but rather a result of the data and algorithms used to train the LLMs. The good news is that this issue can be addressed with further research and development. By incorporating more diverse datasets and using techniques such as bias detection and mitigation, it may be possible to reduce or eliminate these biases.


The implications of this study are far-reaching, particularly in fields such as healthcare, education, and law enforcement where AI systems are increasingly being used to make decisions that affect people’s lives. As we continue to rely on LLMs for a wide range of tasks, it is essential that we understand their limitations and biases.


Ultimately, the study serves as a reminder that AI systems are not neutral or objective, but rather reflections of the data and algorithms used to create them. By acknowledging and addressing these biases, we can work towards creating more inclusive and equitable AI systems that benefit everyone.


Cite this article: “Assessing Biases in Large Language Models: A Comparative Study of Evaluation Methods and Model Performance”, The Science Archive, 2025.


Language Models, Artificial Intelligence, Biases, Language, Stereotypes, Socioeconomic Background, Religious Beliefs, Multiple-Choice Questions, Story Generation, Machine Learning.


Reference: Jiho Jin, Woosung Kang, Junho Myung, Alice Oh, “Social Bias Benchmark for Generation: A Comparison of Generation and QA-Based Evaluations” (2025).


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