AI avatar research refers to methodologies in which synthetic, AI-generated personas stand in for actual human participants, producing simulated responses to research stimuli such as concepts, messaging, or product ideas. Within the broader category of AI-moderated research, it sits at the far end of the automation spectrum, prioritizing scale and speed over participant authenticity. Proponents argue that AI avatar research can generate rapid directional signals without recruitment delays or incentive costs. Critics, including many enterprise insights professionals, raise serious concerns about validity: synthetic respondents cannot replicate the emotional nuance, behavioral cues, or lived experience that drive real consumer decisions. For high-stakes research, the gap between simulated and genuine human response is rarely acceptable.