Academic Appointments

  • Physical Science Research Scientist, Edward L. Ginzton Laboratory

Contact

  • Academic
    fvassel@stanford.edu
    Department: Ginzton, E.L. Laboratory Position: Phys Sci Res Scientist

Additional Info

  • Mail Code: 4090

All Publications

  • Intersectional biases in narratives produced by open-ended prompting of generative language models. Nature communications Shieh, E., Vassel, F. M., Sugimoto, C. R., Monroe-White, T. 2026

    Abstract

    The rapid deployment of generative language models has raised concerns about social biases affecting the well-being of diverse consumers. The extant literature on generative language models has primarily examined bias via explicit identity prompting. However, prior research on bias in language-based technology platforms has shown that discrimination can occur even when identity terms are not specified explicitly. Here, we advance studies of generative language model bias by considering a broader set of natural use cases via open-ended prompting, which we refer to as a laissez-faire environment. In this setting, we find that across 500,000 observations, generated outputs from the base models of five publicly available language models (ChatGPT 3.5, ChatGPT 4, Claude 2.0, Llama 2, and PaLM 2) are more likely to omit characters with minoritized race, gender, and/or sexual orientation identities compared to reported levels in the U.S. Census, or relegate them to subordinated roles as opposed to dominant ones. We also document patterns of stereotyping across language model-generated outputs with the potential to disproportionately affect minoritized individuals. Our findings highlight the urgent need for regulations to ensure responsible innovation while protecting consumers from potential harms caused by language models.

    View details for DOI 10.1038/s41467-025-68004-9

    View details for PubMedID 41507174

  • Autism spectrum disorder: Practice guidelines for pharmacists. Canadian pharmacists journal : CPJ = Revue des pharmaciens du Canada : RPC Kadi, R., Gayed, F., Kauzman, P., Amam Ali, Z., Dmitriev, I., Mikhael, V., Ghabi, R., Hamamji, J., Jabbour, S., Mrchak, M., Guirguis, N., Metras, M. E., Becciolini, L., Vassel, F. M., Gutzeit, A., Cresson, J., Froehlich, J. M., Higgs, T., Dufour, M. M., Matoori, S. 2024; 157 (2): 58-65

    View details for DOI 10.1177/17151635241228495

    View details for PubMedID 38463173

    View details for PubMedCentralID PMC10924569

  • Autism spectrum disorder: Practice guidelines for pharmacists CANADIAN PHARMACISTS JOURNAL Kadi, R., Gayed, F., Kauzman, P., Amam Ali, Z., Dmitriev, I., Mikhael, V., Ghabi, R., Hamamji, J., Jabbour, S., Mrchak, M., Guirguis, N., Metras, M., Becciolini, L., Vassel, F., Gutzeit, A., Cresson, J., Froehlich, J. M., Higgs, T., Dufour, M., Matoori, S. 2024

    View details for DOI 10.1177/17151635241228495

    View details for Web of Science ID 001157970900001