What checks or playtest measures do the open sources propose or use for player agency in interactive narrative?

Partially verified: the curator re-read none of the cited sources; S7, S6, S3, S1, S4 rest on the producer's pinned reading. No inspected source supplies a validated agency instrument. What exists: Thue et al. asked 90 students to rate their experience after fixed or adaptive stories and tested whether adaptive stories felt more influential, with weak overall support and stronger results in filtered subgroups; Wardrip-Fruin et al. report Dow's study of three Facade versions using interviews, finding that greater presence and realism reduced agency by raising expectations; Facade's authors give self-estimated local-agency percentages; Mateas's structural model suggests an analytic check. Roberts and Isbell list measurability as a desideratum. Curator qualifications: Partially verified: the curator re-read none of the cited sources; S7, S6, S3, S1, S4 rest on the producer's pinned reading. Curator GET 2026-10-23 of the sources not re-read (mechanical source evidence, not semantic verification): S7: HTTP 200, bytes equal to the producer pin; S6: HTTP 200, bytes equal to the producer pin; S3: HTTP 200, bytes equal to the producer pin; S1: HTTP 200, bytes equal to the producer pin; S4: HTTP 200, bytes equal to the producer pin. Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

{
  "citations": [
    {
      "url": "https://cdn.aaai.org/ojs/18780/18780-52-22477-1-10-20210929.pdf",
      "note": "candidate evidence excerpts"
    },
    {
      "url": "https://www.cs.uky.edu/~sgware/reading/papers/wardripfruin2009agency.pdf",
      "note": "candidate evidence excerpts"
    },
    {
      "url": "https://cdn.aaai.org/ojs/18722/18722-52-22361-1-10-20210928.pdf",
      "note": "candidate evidence excerpts"
    },
    {
      "url": "https://www.cs.uky.edu/~sgware/reading/papers/roberts2008survey.pdf",
      "note": "candidate evidence excerpts"
    },
    {
      "url": "https://cs.uky.edu/~sgware/reading/papers/evans2014versu.pdf",
      "note": "candidate evidence excerpts"
    }
  ]
}