Large language models cannot replace human participants because they cannot portray identity groups

• https://arxiv.org/abs/2402.01908
• Angelina Wang, Jamie Morgenstern, John P. Dickerson

Personas

We argue analytically for why LLMs are doomed to both misportray and flatten the representations of demographic groups, then empirically show this to be true on 4 LLMs through a series of human studies with 3200 participants across 16 demographic identities.