{
  "stimulus_set_id": "soccer_generated_v04",
  "spec_version": "0.3",
  "created_date": "2026-10-08",
  "generator": "built-in image_gen tool",
  "image_status": "generated_prototype_not_validated_research_stimuli",
  "team_colors": {
    "teammates_and_participant": "red",
    "opponents": "blue"
  },
  "response_mapping": {
    "left_opponent": {
      "direction": "right",
      "key": "k"
    },
    "right_opponent": {
      "direction": "left",
      "key": "f"
    }
  },
  "generation_pipeline": [
    "Generate left-opponent scene.",
    "Remove ball and own-kit edge to make initial and final scenes reusable.",
    "Edit cleaned left scene to relocate the opponent to viewer right.",
    "Generate common receiving scene using cleaned left scene as setting/style reference.",
    "Edit receiving foreground to remove seated-looking knees/thighs and shorten visible legs, depicting standing ball reception.",
    "Generate a new receiving composition with a standing eye-height downward gaze, excluding distant scenery and showing nearby grass, ball and foreshortened boots.",
    "Generate an eye-level pre-reception scene facing a red teammate and an approaching airborne ball; remove all own-body/foot imagery. User accepted distinguishing pre-reception from post-reception reassessment."
  ],
  "pair_invariants_requested": [
    "camera and crop",
    "goal and scenery",
    "red teammate positions",
    "blue opponent identity and apparent size",
    "lighting"
  ],
  "pair_pixel_identity_guaranteed": false,
  "intermediate_image_notes": [
    "Revision 4 represents the instant before reception, looking toward a red teammate and approaching ball at standing eye level; the participant body is outside frame.",
    "The final upfield image represents post-reception reassessment. The intermediate does not impose prolonged downward gaze at the feet.",
    "The same intermediate image is used in all trial conditions; the player and ball are approximately horizontally centered and no blue opponent appears.",
    "The static display duration is an experimental interruption interval, not a measured elite-player fixation duration or a physically simulated ball flight.",
    "The own-half direction is conveyed by the scenario and instructions; image generation does not establish a geometrically exact 180-degree reverse of the upfield background."
  ],
  "assets": [
    {
      "id": "opponent_left",
      "path_relative_to_project_root": "assets/opponent_left.png",
      "opponent_side_from_viewer": "left",
      "used_in_phases": [
        "initial",
        "final"
      ],
      "width_px": 1672,
      "height_px": 941,
      "mode": "RGB",
      "format": "PNG",
      "sha256": "49d91a64374dee21b7b05b0af0713f292499e00c6932cebd67644043aa741713",
      "generated_source_filename": "exec-4d558d76-8d25-452a-8b52-98762446cb89.png",
      "description": "Blue opponent on viewer left; red teammates on both sides."
    },
    {
      "id": "opponent_right",
      "path_relative_to_project_root": "assets/opponent_right.png",
      "opponent_side_from_viewer": "right",
      "used_in_phases": [
        "initial",
        "final"
      ],
      "width_px": 1672,
      "height_px": 941,
      "mode": "RGB",
      "format": "PNG",
      "sha256": "b5b92a8b35fbe7b54e8fb8a3bdbffdbfa61ee37ad6a642ae9cd6993ccad089d2",
      "generated_source_filename": "exec-07af8f61-1afa-4c63-9353-268959825ee1.png",
      "description": "Blue opponent on viewer right; edited from opponent_left without global mirroring."
    },
    {
      "id": "receive_pass",
      "path_relative_to_project_root": "assets/receive_pass_v04.png",
      "opponent_side_from_viewer": null,
      "used_in_phases": [
        "intermediate"
      ],
      "width_px": 1671,
      "height_px": 941,
      "mode": "RGB",
      "format": "PNG",
      "sha256": "544684e70f1ddd601c6c8266fbedb1ae3f28f034fc146bb186be7bcb0950f527",
      "generated_source_filename": "exec-255cb66f-6592-4851-a60e-ebf99de11f58.png",
      "description": "Standing first-person eye-level view toward one red teammate and a horizontally centered approaching ball immediately before reception; no own feet, legs, body or blue opponent visible; common to all trials.",
      "revision": 4,
      "composition": "standing_eye_level_pre_reception",
      "distant_teammate_visible": true,
      "own_body_visible": false
    }
  ],
  "superseded_assets": [
    {
      "id": "receive_pass",
      "path_relative_to_project_root": "assets/receive_pass.png",
      "opponent_side_from_viewer": null,
      "used_in_phases": [
        "intermediate"
      ],
      "width_px": 1672,
      "height_px": 941,
      "mode": "RGB",
      "format": "PNG",
      "sha256": "fc030b9eebf472665b410c4f6e1dc8a934088868ea03894e7bb1abf97cda813b",
      "generated_source_filename": "exec-a6ccd219-6ace-4953-abc1-cd341bb6abd6.png",
      "description": "First-person reception from red teammate; common to all trials; no blue opponent.",
      "superseded_reason": "User identified a seated-looking foreground posture; replaced with standing-reception revision.",
      "used_in_active_task": false
    },
    {
      "id": "receive_pass",
      "path_relative_to_project_root": "assets/receive_pass_v02.png",
      "opponent_side_from_viewer": null,
      "used_in_phases": [
        "intermediate"
      ],
      "width_px": 1672,
      "height_px": 941,
      "mode": "RGB",
      "format": "PNG",
      "sha256": "efbd6712c69f3971b4645a12610117a0a7fda4edfe3bfe29aa6de279bec913dd",
      "generated_source_filename": "exec-4786b31f-2a4c-498d-ba5b-41402cdf3115.png",
      "description": "First-person standing ball reception from red teammate, with no visible knees/thighs and feet restricted to lower edge; common to all trials; no blue opponent.",
      "revision": 2,
      "superseded_reason": "User still found revision 2 unnatural. Replaced the combined distant-scene-and-foreground-feet composition with a downward-gaze view.",
      "used_in_active_task": false
    },
    {
      "id": "receive_pass",
      "path_relative_to_project_root": "assets/receive_pass_v03.png",
      "opponent_side_from_viewer": null,
      "used_in_phases": [
        "intermediate"
      ],
      "width_px": 1672,
      "height_px": 941,
      "mode": "RGB",
      "format": "PNG",
      "sha256": "9a211e732e9b2691b09d3f79100094f018716e099b2f8e460deb934825a8e457",
      "generated_source_filename": "exec-57ea758d-160a-43bf-b8c0-62746c09bd77.png",
      "description": "First-person downward gaze from a standing receiver toward nearby grass and a ball touching the inside of the right boot; no horizon or distant player; red socks and black boots; common to all trials.",
      "revision": 3,
      "composition": "standing_receiver_downward_gaze",
      "distant_teammate_visible": false,
      "superseded_reason": "Downward-gaze view rejected as the default representation of post-trap play. Replaced with an eye-level pre-reception scene following user agreement.",
      "used_in_active_task": false
    }
  ],
  "updated_date": "2026-10-09"
}