{
  "research_cutoff": "2026-09-28",
  "type": "Study-design comparison, not pooled meta-analysis",
  "rows": [
    {
      "source": {
        "id": "F1",
        "url": "https://www.apa.org/news/press/releases/2022/07/friends-enjoy-being-reached"
      },
      "year": 2022,
      "sample": "More than 5,900 across experiments",
      "outcome": "Predicted versus experienced appreciation",
      "limit": "Does not guarantee welcome in a particular relationship"
    },
    {
      "source": {
        "id": "F2",
        "url": "https://www.nature.com/articles/s44271-024-00075-8"
      },
      "year": 2024,
      "sample": "Seven studies",
      "outcome": "Hesitation and observed sending opportunities",
      "limit": "Selected study conditions; do not infer population reach-out rates"
    },
    {
      "source": {
        "id": "F3",
        "url": "https://online.ucpress.edu/collabra/article/11/1/143319/212890/Who-Reaches-Out-to-Old-Friends-and-What-Do-They"
      },
      "year": 2025,
      "sample": "863 prior notes; follow-up sample 312",
      "outcome": "Message content associations with sending",
      "limit": "Reused materials; no pooling or claim all wording equivalent"
    }
  ]
}