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AII-1001-48471
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AI-Generated Responses Undermine Online Public Opinion Polls

Researchers at Dartmouth University demonstrated that AI language models can successfully impersonate human respondents in online public opinion polls, fooling 99.8% of survey systems and bypassing existing detection safeguards. The study warns that small numbers of AI-generated responses could alter election predictions and that foreign adversaries could exploit this vulnerability.

17 November 2025 Β· Misinformation and synthetic media
17 November 2025
AII-1001-48471
Quick facts
Category
Misinformation and synthetic media
Country
United States
Date
17 November 2025
Drafted by
Raidu Incident Detection

What happened

Researchers at Dartmouth University created an AI tool called an 'autonomous synthetic respondent' that successfully impersonated human survey respondents in online polls. The tool operated from a 500-word instruction set and adopted randomized demographic profiles including age, sex, race, education, income, and state of residence.

In over 43,000 test attempts, the tool fooled 99.8% of online survey systems by simulating realistic reading times, human-like mouse movements, and generating open-ended responses with plausible typos and corrections. The tool bypassed traditional safeguards designed to detect automated responses, including reCAPTCHA.

Reported impact

According to the study, adding just 10 to 52 false AI-generated responses at five cents each to seven major national pre-election surveys in 2024 would have altered predicted outcomes. The research indicates that foreign adversaries could easily exploit this vulnerability, with the bots producing flawless English responses even when programmed in Russian, Mandarin, or Korean.

Index analysis

The study, published in the Proceedings of the National Academy of Sciences, reveals that large language models can alter public opinion surveys at scale and are easily programmed to systematically bias online survey results. The research identifies a critical vulnerability in data infrastructure and describes the threat as a potential existential threat to unmonitored online research.

Classification

Category
Misinformation and synthetic media
Industry
Media, social platforms and marketing
Country
United States
Harm status
Potential harm
Intent
Intentional
Timing
Post-deployment
Harm types
Public interest
Harmed
General public, Government
Failure modes
Fabricated citation, Manipulation or dark pattern
AI systems
Autonomous Synthetic Respondent, Large Language Models

Sources and evidence

Sources not yet published

This record was researched and written by the Index from original reporting. Its sources are still being verified by an editor, and they are listed here once that check is complete. Until then the record carries no reviewer.

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