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Manoel Horta Ribeiro

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Manoel Horta Ribeiro is a computer scientist and a professor at Princeton University.[1] Ribeiro is recognized for his work on online platforms, studying recommender systems[2][3] and the impact of generative AI.[4][5]

Biography

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Ribeiro received a BSc and an MSc in computer science from the Federal University of Minas Gerais[6] and a Ph.D. in computer science from EPFL, advised by Robert West.[7] Following his PhD, he then joined the Princeton's Computer Science Department.[1]

In 2020, in a paper published at the ACM Conference on Fairness, Accountability, Ribeiro and co-authors found evidence of a radicalization pipeline on YouTube, finding that users “systematically progress towards more extreme content on the platform.”[8][9][10] A YouTube spokesperson responded that the research did not reflect changes to their search and discovery algorithms and that they disagreed with the research methodology and conclusions.[11] Later work indicated that this process was driven largely by user preferences rather than YouTube's algorithm.[3][12] For example, in an article by The Atlantic, he argued that the popularity of controversial influencers is not due to some "preference" of the algorithm, but because their content is engaging.[13]

In other work, Ribeiro has studied the impact of generative AI systems on online platforms. His research found that AI chatbots are persuasive in debates,[5] which indicates that AIs might be used for targeted persuasion campaigns.[14] Further, he found that they are widely used in crowdsourcing platforms like MTurk and Prolific, threatening the integrity of research that relies on these platforms.[4][15]

Honors and awards

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Ribeiro has received multiple honors and awards, including:

  • Receiving a Forbes 30 under 30 Award.[2]
  • Receiving a Meta research fellowship.[16][17]
  • Receiving a Google Latin America Research award.[18]
  • Receiving awards at CS conferences such as CSCW[19] and ICWSM.[20]

References

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  1. ^ a b Office of Communications (2024-10-02). "Board approves 22 new faculty appointments". www.princeton.edu. Retrieved 2024-12-04.
  2. ^ a b "Forbes 30 Under 30 2023: Science & Healthcare". Forbes. Retrieved 2024-12-04.
  3. ^ a b "YouTube has managed to stop its algorithm serving up extreme videos". New Scientist. 2024-02-27. Retrieved 2024-12-04.
  4. ^ a b "AI could accelerate scientific fraud as well as progress". The Economist. ISSN 0013-0613. Retrieved 2024-12-04.
  5. ^ a b "AI chatbots beat humans at persuading their opponents in debates". New Scientist. Retrieved 2024-12-04.
  6. ^ "Algoritmos parciais". revistapesquisa.fapesp.br (in Brazilian Portuguese). Retrieved 2024-12-04.
  7. ^ Horta Ribeiro, Manoel (2024). Content Moderation in Online Platforms (Thesis). EPFL.
  8. ^ Newton, Casey (2019-08-28). "YouTube may push users to more radical views over time, a new paper argues". The Verge. Retrieved 2024-12-04.
  9. ^ "YouTube radicalization pipeline exists, study says". NBC News. Retrieved 2024-12-07.
  10. ^ Horta Ribeiro, Manoel; Ottoni, Raphael; West, Robert; Almeida, Virgílio A. F.; Meira, Wagner (2020-01-27). "Auditing radicalization pathways on YouTube". Proceedings of the 2020 Conference on Fairness, Accountability, and Transparency. FAT* '20. New York, NY, USA: Association for Computing Machinery. pp. 131–141. doi:10.1145/3351095.3372879. ISBN 978-1-4503-6936-7.
  11. ^ Dickson, Ej (2019-08-28). "Study Shows How the 'Intellectual Dark Web' Is a Gateway to the Far Right". Rolling Stone. Retrieved 2024-12-13.
  12. ^ Martineau, Paris. "Maybe It's Not YouTube's Algorithm That Radicalizes People". Wired. ISSN 1059-1028. Retrieved 2024-12-07.
  13. ^ Tiffany, Kaitlyn (2023-03-07). "Andrew Tate Is Haunting YouTube". The Atlantic. Retrieved 2024-12-12.
  14. ^ "Artificial intelligence can speed-sort satellite photos. Could it also recruit an agent?". The Economist. ISSN 0013-0613. Retrieved 2024-12-04.
  15. ^ "Psychology study participants recruited online may provide nonsensical answers". www.science.org. Retrieved 2024-12-07.
  16. ^ "Research fellow: Manoel Horta Ribeiro". Meta Research.
  17. ^ "PhD and Industry Fellowship Laureates". EPFL. 2024-04-23. Retrieved 2024-12-04.
  18. ^ "Latin America Research Awards (2017 - 2021)". research.google. Retrieved 2024-12-04.
  19. ^ "Conference Programs". programs.sigchi.org. Retrieved 2024-12-04.
  20. ^ ICWSM. "A thread on the #ICWSM24 awards". X.
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