{
  "design": "Fourfold pattern of risk attitudes (Kahneman & Tversky, 1979; Tversky & Kahneman, 1992)",
  "monetary_unit": "M (e.g., 3000 in local currency)",
  "note": "Items 1-4 = minimal fourfold set (K&T Table I). Items 5-8 = parallel set (K&T Problems 7-8, 7'-8'). Original 1979 paper had 20 items in 13 contrasts; Ruggeri et al. 2020 used same 20 items.",
  "items": [
    {
      "item_id": 1,
      "cell": "high_p_gains",
      "domain": "gains",
      "probability": "high",
      "risk_prediction": "averse",
      "option_a": {
        "text": "M for sure",
        "text_display": "M for sure.",
        "is_safe": true,
        "is_risky": false
      },
      "option_b": {
        "text": "1.33M with probability 0.80, otherwise 0",
        "text_display": "1.33M with probability 0.80, otherwise 0.",
        "is_safe": false,
        "is_risky": true
      },
      "predicted_option": "A",
      "hypothesis": "H1"
    },
    {
      "item_id": 2,
      "cell": "low_p_gains",
      "domain": "gains",
      "probability": "low",
      "risk_prediction": "seeking",
      "option_a": {
        "text": "1.33M with probability 0.20, otherwise 0",
        "text_display": "1.33M with probability 0.20, otherwise 0.",
        "is_safe": false,
        "is_risky": true
      },
      "option_b": {
        "text": "M with probability 0.25, otherwise 0",
        "text_display": "M with probability 0.25, otherwise 0.",
        "is_safe": true,
        "is_risky": false
      },
      "predicted_option": "A",
      "hypothesis": "H2"
    },
    {
      "item_id": 3,
      "cell": "high_p_losses",
      "domain": "losses",
      "probability": "high",
      "risk_prediction": "seeking",
      "option_a": {
        "text": "-1.33M with probability 0.80, otherwise 0",
        "text_display": "-1.33M with probability 0.80, otherwise 0.",
        "is_safe": false,
        "is_risky": true
      },
      "option_b": {
        "text": "-M for sure",
        "text_display": "-M for sure.",
        "is_safe": true,
        "is_risky": false
      },
      "predicted_option": "A",
      "hypothesis": "H3"
    },
    {
      "item_id": 4,
      "cell": "low_p_losses",
      "domain": "losses",
      "probability": "low",
      "risk_prediction": "averse",
      "option_a": {
        "text": "-M with probability 0.25, otherwise 0",
        "text_display": "-M with probability 0.25, otherwise 0.",
        "is_safe": true,
        "is_risky": false
      },
      "option_b": {
        "text": "-1.33M with probability 0.20, otherwise 0",
        "text_display": "-1.33M with probability 0.20, otherwise 0.",
        "is_safe": false,
        "is_risky": true
      },
      "predicted_option": "A",
      "hypothesis": "H4"
    },
    {
      "item_id": 5,
      "cell": "high_p_gains",
      "domain": "gains",
      "probability": "high",
      "risk_prediction": "averse",
      "option_a": {
        "text": "M with probability 0.90, otherwise 0",
        "text_display": "M with probability 0.90, otherwise 0.",
        "is_safe": true,
        "is_risky": false
      },
      "option_b": {
        "text": "2M with probability 0.45, otherwise 0",
        "text_display": "2M with probability 0.45, otherwise 0.",
        "is_safe": false,
        "is_risky": true
      },
      "predicted_option": "A",
      "hypothesis": "H1",
      "source_notes": "K&T Problem 7 (0.90/0.45)"
    },
    {
      "item_id": 6,
      "cell": "low_p_gains",
      "domain": "gains",
      "probability": "low",
      "risk_prediction": "seeking",
      "option_a": {
        "text": "2M with probability 0.001, otherwise 0",
        "text_display": "2M with probability 0.001, otherwise 0.",
        "is_safe": false,
        "is_risky": true
      },
      "option_b": {
        "text": "M with probability 0.002, otherwise 0",
        "text_display": "M with probability 0.002, otherwise 0.",
        "is_safe": true,
        "is_risky": false
      },
      "predicted_option": "A",
      "hypothesis": "H2",
      "source_notes": "K&T Problem 8 (0.002/0.001)"
    },
    {
      "item_id": 7,
      "cell": "high_p_losses",
      "domain": "losses",
      "probability": "high",
      "risk_prediction": "seeking",
      "option_a": {
        "text": "-2M with probability 0.45, otherwise 0",
        "text_display": "-2M with probability 0.45, otherwise 0.",
        "is_safe": false,
        "is_risky": true
      },
      "option_b": {
        "text": "-M with probability 0.90, otherwise 0",
        "text_display": "-M with probability 0.90, otherwise 0.",
        "is_safe": true,
        "is_risky": false
      },
      "predicted_option": "A",
      "hypothesis": "H3",
      "source_notes": "K&T Problem 7' (loss)"
    },
    {
      "item_id": 8,
      "cell": "low_p_losses",
      "domain": "losses",
      "probability": "low",
      "risk_prediction": "averse",
      "option_a": {
        "text": "-M with probability 0.002, otherwise 0",
        "text_display": "-M with probability 0.002, otherwise 0.",
        "is_safe": true,
        "is_risky": false
      },
      "option_b": {
        "text": "-2M with probability 0.001, otherwise 0",
        "text_display": "-2M with probability 0.001, otherwise 0.",
        "is_safe": false,
        "is_risky": true
      },
      "predicted_option": "A",
      "hypothesis": "H4",
      "source_notes": "K&T Problem 8' (loss)"
    }
  ]
}