{
  "cases": [
    {
      "current_dwell_ms": 800,
      "expected_direction": "longer",
      "expected_proposal_ms": 897,
      "glances": 0,
      "late_abandons": 0,
      "max_dwell_ms": 2000,
      "name": "30% undone: one rung longer",
      "selections": 20,
      "undos": 6
    },
    {
      "current_dwell_ms": 800,
      "expected_direction": "longer",
      "expected_proposal_ms": 897,
      "glances": 0,
      "late_abandons": 0,
      "max_dwell_ms": 2000,
      "name": "5 of 24 undone, just over 20%: longer",
      "selections": 24,
      "undos": 5
    },
    {
      "current_dwell_ms": 800,
      "expected_direction": "none",
      "expected_proposal_ms": null,
      "glances": 0,
      "late_abandons": 0,
      "max_dwell_ms": 2000,
      "name": "exactly 20% undone: nothing",
      "selections": 20,
      "undos": 4
    },
    {
      "current_dwell_ms": 800,
      "expected_direction": "shorter",
      "expected_proposal_ms": 736,
      "glances": 0,
      "late_abandons": 8,
      "max_dwell_ms": 2000,
      "name": "8 of 28 attempts abandoned late, no undos: one rung shorter",
      "selections": 20,
      "undos": 0
    },
    {
      "current_dwell_ms": 800,
      "expected_direction": "none",
      "expected_proposal_ms": null,
      "glances": 0,
      "late_abandons": 5,
      "max_dwell_ms": 2000,
      "name": "exactly 20% abandoned late: nothing",
      "selections": 20,
      "undos": 0
    },
    {
      "current_dwell_ms": 800,
      "expected_direction": "none",
      "expected_proposal_ms": null,
      "glances": 0,
      "late_abandons": 8,
      "max_dwell_ms": 2000,
      "name": "late abandons, but 5% undone: nothing",
      "selections": 20,
      "undos": 1
    },
    {
      "current_dwell_ms": 800,
      "expected_direction": "longer",
      "expected_proposal_ms": 897,
      "glances": 0,
      "late_abandons": 8,
      "max_dwell_ms": 2000,
      "name": "undos and late abandons both high: longer wins",
      "selections": 20,
      "undos": 6
    },
    {
      "current_dwell_ms": 800,
      "expected_direction": "none",
      "expected_proposal_ms": null,
      "glances": 30,
      "late_abandons": 0,
      "max_dwell_ms": 2000,
      "name": "glances are not abandons: nothing",
      "selections": 20,
      "undos": 0
    },
    {
      "current_dwell_ms": 800,
      "expected_direction": "none",
      "expected_proposal_ms": null,
      "glances": 0,
      "late_abandons": 0,
      "max_dwell_ms": 2000,
      "name": "nine selections: too few for any proposal",
      "selections": 9,
      "undos": 5
    },
    {
      "current_dwell_ms": 800,
      "expected_direction": "none",
      "expected_proposal_ms": null,
      "glances": 0,
      "late_abandons": 0,
      "max_dwell_ms": 2000,
      "name": "ninety clean selections: nothing",
      "selections": 90,
      "undos": 0
    },
    {
      "current_dwell_ms": 2000,
      "expected_direction": "none",
      "expected_proposal_ms": null,
      "glances": 0,
      "late_abandons": 0,
      "max_dwell_ms": 2000,
      "name": "at the ceiling: nothing longer",
      "selections": 20,
      "undos": 6
    },
    {
      "current_dwell_ms": 1900,
      "expected_direction": "longer",
      "expected_proposal_ms": 2000,
      "glances": 0,
      "late_abandons": 0,
      "max_dwell_ms": 2000,
      "name": "one rung past the ceiling: the ceiling",
      "selections": 20,
      "undos": 6
    },
    {
      "current_dwell_ms": 320,
      "expected_direction": "shorter",
      "expected_proposal_ms": 300,
      "glances": 0,
      "late_abandons": 8,
      "max_dwell_ms": 2000,
      "name": "one rung below the proposal floor: the floor",
      "selections": 20,
      "undos": 0
    },
    {
      "current_dwell_ms": 300,
      "expected_direction": "none",
      "expected_proposal_ms": null,
      "glances": 0,
      "late_abandons": 8,
      "max_dwell_ms": 2000,
      "name": "at the proposal floor: nothing shorter",
      "selections": 20,
      "undos": 0
    },
    {
      "current_dwell_ms": 200,
      "expected_direction": "longer",
      "expected_proposal_ms": 235,
      "glances": 0,
      "late_abandons": 0,
      "max_dwell_ms": 2000,
      "name": "the person chose 200 ms and often undoes: one rung up, still under 300",
      "selections": 20,
      "undos": 6
    }
  ],
  "opt_in": [
    {
      "current_dwell_ms": 800,
      "expected_dwell_ms": 897,
      "late_abandons": 0,
      "max_dwell_ms": 2000,
      "name": "undos push one rung longer, once",
      "selections": 20,
      "undos_after_opt_in": 6
    },
    {
      "current_dwell_ms": 800,
      "expected_dwell_ms": 736,
      "late_abandons": 12,
      "max_dwell_ms": 2000,
      "name": "late abandons pull one rung shorter at the first undo, once",
      "selections": 40,
      "undos_after_opt_in": 1
    },
    {
      "current_dwell_ms": 800,
      "expected_dwell_ms": 800,
      "late_abandons": 0,
      "max_dwell_ms": 2000,
      "name": "ninety clean selections change nothing",
      "selections": 90,
      "undos_after_opt_in": 0
    }
  ],
  "rule": {
    "absolute_floor_ms": 150,
    "adaptation_default": false,
    "ladder": "DT(X) = 300 * e^(X / 12) - 150 ms; rung X = round(12 * ln((dwell + 150) / 300)); a step is round(DT(X +/- 1))",
    "late_abandon": "gaze leaves a target after at least half the dwell time",
    "longer": "5 * undos > selections: one rung up, capped at max_dwell_ms; nothing at the ceiling",
    "min_events": 10,
    "proposal_floor_ms": 300,
    "set_dwell": "clamp(requested, absolute_floor_ms, max_dwell_ms)",
    "shorter": "20 * undos < selections and 5 * late_abandons > selections + late_abandons: one rung down, never below proposal_floor_ms; nothing at or below it",
    "window": "counts restart whenever the dwell changes; nothing is proposed before min_events selections"
  },
  "set_dwell": [
    {
      "expected_dwell_ms": 150,
      "max_dwell_ms": 2000,
      "requested_ms": 50
    },
    {
      "expected_dwell_ms": 150,
      "max_dwell_ms": 2000,
      "requested_ms": 149
    },
    {
      "expected_dwell_ms": 150,
      "max_dwell_ms": 2000,
      "requested_ms": 150
    },
    {
      "expected_dwell_ms": 1234,
      "max_dwell_ms": 2000,
      "requested_ms": 1234
    },
    {
      "expected_dwell_ms": 2000,
      "max_dwell_ms": 2000,
      "requested_ms": 2000
    },
    {
      "expected_dwell_ms": 2000,
      "max_dwell_ms": 2000,
      "requested_ms": 10000
    }
  ],
  "spec": "SPEC.md §5.1, §5.3",
  "standard": "aac",
  "vector": "dwell",
  "version": "0.2.0"
}