Improving Linguistic Diversity of Large Language Models with Possibility Exploration Fine-Tuning

• URL: http://arxiv.org/abs/2412.03343v1
• Date: Wed, 04 Dec 2024 14:23:16 GMT
• Title: Improving Linguistic Diversity of Large Language Models with Possibility Exploration Fine-Tuning
• Authors: Long Mai, Julie Carson-Berndsen,
• Abstract summary: Possibility Exploration Fine-Tuning (PEFT) is a task-agnostic framework that enhances the text diversity of Large Language Models (LLMs) without increasing latency or computational cost. PEFT significantly enhances the diversity of LLM outputs, as evidenced by lower similarity between candidate responses. It can also notably reduce demographic bias in dialogue systems.
• Score: 23.456302461693053
• License:
• Abstract: While Large Language Models (LLMs) have made significant strides in replicating human-like abilities, there are concerns about a reduction in the linguistic diversity of their outputs. This results in the homogenization of viewpoints and perspectives, as well as the underrepresentation of specific demographic groups. Although several fine-tuning and prompting techniques have been suggested to tackle the issue, they are often tailored to specific tasks or come with a substantial increase in computational cost and latency. This makes them challenging to apply to applications that demand very low latency, such as chatbots and virtual assistants. We propose Possibility Exploration Fine-Tuning (PEFT), a task-agnostic framework that enhances the text diversity of LLMs without increasing latency or computational cost. Given the same prompt, models fine-tuned with PEFT can simultaneously generate multiple diverse responses, each corresponding with a controllable possibility number. Experiments on dialogue and story generation tasks demonstrate that PEFT significantly enhances the diversity of LLM outputs, as evidenced by lower similarity between candidate responses. Since PEFT emphasizes semantic diversity over lexical diversity, it can also notably reduce demographic bias in dialogue systems. The implementations and datasets are available in our repository: https://github.com/mailong25/peft_diversity

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