GLaPE: Gold Label-agnostic Prompt Evaluation and Optimization for Large Language Model
CoRR(2024)
摘要
Despite the rapid progress of large language models (LLMs), their task
performance remains sensitive to prompt design. Recent studies have explored
leveraging the LLM itself as an optimizer to identify optimal prompts that
maximize task accuracy. However, when evaluating prompts, such approaches
heavily rely on elusive manually annotated gold labels to calculate task
accuracy for each candidate prompt, which hinders the widespread implementation
and generality. To overcome the limitation, this work proposes a gold
label-agnostic prompt evaluation (GLaPE) to alleviate dependence on gold
labels. Motivated by the observed correlation between self-consistency and the
accuracy of the answer, we adopt self-consistency as the initial evaluation
score. Subsequently, we refine the scores of prompts producing identical
answers to be mutually consistent. Experimental results show that GLaPE
provides reliable evaluations uniform with accuracy, even in the absence of
gold labels. Moreover, on six popular reasoning tasks, our GLaPE-based prompt
optimization yields effective prompts comparable to accuracy-based ones. The
code is publicly available at https://github.com/thunderous77/GLaPE.
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