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  "doi": null,
  "retrievedAt": "2026-07-16T18:20:55.719Z",
  "createdAt": "2026-05-04T07:55:31.734Z",
  "updatedAt": "2026-05-04T07:55:31.734Z",
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    "text": "[dryrun-2026-05-04] Confounding factors—including pre-existing homophily, cable-television exposure, partisan elite polarization, and demographic sorting—do not fully account for the observed growth in affective polarization, leaving room for algorithmic effects."
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      "text": "Guess et al. (2023) experimentally removed reshared content from Facebook feeds during the 2020 US election, substantially reducing political-news exposure but finding no detectable polarization effect.",
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      "text": "Resharing is the feature most associated with viral spread and algorithmic amplification on Facebook.",
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