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Acerbi & Stubbersfield (2023)

Large language models show human-like content biases in transmission chain experiments

Proceedings of the National Academy of Sciences, 120(44)

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Abstract

As the use of large language models (LLMs) grows, it is important to examine whether they exhibit biases in their output. Research in cultural evolution, using transmission chain experiments, demonstrates that humans have biases to attend to, remember, and transmit some types of content over others. Here, in five preregistered experiments using material from previous studies with human participants, we use the same, transmission chain-like methodology, and find that the LLM ChatGPT-3 shows biases analogous to humans for content that is gender-stereotype-consistent, social, negative, threat-related, and biologically counterintuitive, over other content. The presence of these biases in LLM output suggests that such content is widespread in its training data and could have consequential downstream effects, by magnifying preexisting human tendencies for cognitively appealing and not necessarily informative, or valuable, content.

Reference

Acerbi, A., & Stubbersfield, J. M. (2023). Large language models show human-like content biases in transmission chain experiments. Proceedings of the National Academy of Sciences, 120(44). https://doi.org/10.1073/pnas.2313790120

What Rests on This

1 mechanism cites this source. Each finding below is quoted as it appears on that mechanism's own page.

Schema Application Representational Structures

  • Measured in AI

    Using the story from a human serial-reproduction study of gender stereotypes (Kashima, 2000), five preregistered experiments had ChatGPT (January 2023 version) repeatedly retell the story in chains; like people, it passed on stereotype-consistent content more than inconsistent content (beta = 0.058, p < .01), but unlike people it did so from the first retelling, where human participants had favoured inconsistent details

  • Measured in AI

    That comparison is uneven and off-scale: the model was told to summarize a text it could still see, whereas people retold the story from memory, and results were reported as regression slopes for one AI system with no matching human spread, so no rating can be drawn from it