本研究旨在以視覺實驗模擬現實生活中機率資訊未能明確揭示下之風險情境，並進而探討面對此不確定情境下經濟決策者之風險態度。實驗中受試者將被要求從兩兩一組之等同於單一經濟樂透或複合樂透的風險選項裡選擇自己偏好的組合。實驗結果顯示：（一）面對具相同機率分配之單一與複合樂透，決策者偏向趨避複合樂透之選項，（二）此趨避態勢隨樂透得獎機率提高而更形顯著，（三）決策者賦予單一樂透與複合樂透不同的機率評價模式，且（四）面對複合樂透之機率評價模式具有相對較大之變異性。

This research uses visual task experiments to mimic the realistic environment where risky decisions are made without explicit information regarding probabilities of happening events, and to investigate how individuals make economic decisions when facing such uncertainty. During the experiment subjects choose between pairs of economic alternatives which are mathematically equivalent to single or compound lotteries. The results suggest: (1) decision makers are averse to compound lotteries when choosing between single and compound lotteries of mathematically equivalent probability distributions; (2) there's a stronger aversion to compound lotteries when facing a higher overall probability to gain the monetary reward; (3) individuals use different probability weighting functions to evaluate probabilities in compound and single lotteries; and (4) there's a greater variation of probability weighting functions evaluating compound lotteries.

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