{
  "title": "利用頻度の異なる参加者を確保し、完了枠の不足を早めに補う",
  "subtitle": "Checkout discovery · 2026-09-21–10-02募集 · Research Operations",
  "study": "Checkout Study R4",
  "segments": [
    { "id": "weekly-buyers", "label": "週1回以上の購入者", "screener": "直近30日で購入2回以上。従業員アカウントは除外。", "target": 3 },
    { "id": "first-order", "label": "初回購入者", "screener": "過去に注文がなく、今月初回購入を完了した利用者。", "target": 2 },
    { "id": "assistive-tech", "label": "支援技術利用者", "screener": "日常的にキーボードまたはスクリーンリーダーで購入する。", "target": 2 }
  ],
  "participants": [
    { "id": "P-R4-021", "segmentId": "weekly-buyers", "status": "scheduled", "consent": "granted", "screenerNote": "条件一致。モバイル購入を希望。", "sessionDate": "2026-09-25" },
    { "id": "P-R4-022", "segmentId": "weekly-buyers", "status": "screening", "consent": "granted", "screenerNote": "直近注文数と配送先変更経験を確認中。" },
    { "id": "P-R4-023", "segmentId": "first-order", "status": "invited", "consent": "pending", "screenerNote": "初回購入の対象条件を注文イベントで確認済み。" },
    { "id": "P-R4-024", "segmentId": "assistive-tech", "status": "completed", "consent": "granted", "screenerNote": "キーボード操作と音声読み上げを併用。", "sessionDate": "2026-09-23" }
  ]
}