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arXiv · 2305.09477

Unjustified Sample Sizes and Generalizations in Explainable AI Research: Principles for More Inclusive User Studies

Uwe Peters·Mary Carman
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Abstract

Many ethical frameworks require artificial intelligence (AI) systems to be explainable. Explainable AI (XAI) models are frequently tested for their adequacy in user studies. Since different people may have different explanatory needs, it is important that participant samples in user studies are large enough to represent the target population to enable generalizations. However, it is unclear to what extent XAI researchers reflect on and justify their sample sizes or avoid broad generalizations across people. We analyzed XAI user studies (n = 220) published between 2012 and 2022. Most studies did not offer rationales for their sample sizes. Moreover, most papers generalized their conclusions beyond their target population, and there was no evidence that broader conclusions in quantitative studies were correlated with larger samples. These methodological problems can impede evaluations of whether XAI systems implement the explainability called for in ethical frameworks. We outline principles for more inclusive XAI user studies.

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Uwe Peters, Mary Carman. 2023-05-08. Unjustified Sample Sizes and Generalizations in Explainable AI Research: Principles for More Inclusive User Studies. https://arxiv.org/abs/2305.09477

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