77779193永利官网于10月6日在陽光校區7-536舉辦了2022年第9期“崇德”學術沙龍。郎喬奇博士和孫昳副教授參與主持此次學術沙龍論壇并發表點評。本次學術沙龍論壇由喻學良、齊紫淩同學主講。永利官网部分研究生積極參加了此次活動。

喻學良同學介紹了論文《Are Explanations Helpful? A Comparative Study of the Effects of Explanations in AI-Assisted Decision-Making》，This paper contributes to the growing literature in empirical evaluation of explainable AI (XAI) methods by presenting a comparison on the effects of a set of established XAI methods in AI-assisted decision making. Specifically, based on our review of previous literature, we highlight three desirable properties that ideal AI explanations should satisfy—improve people’s understanding of the AI model, help people recognize the model uncertainty, and support people’s calibrated trust in the model. Through randomized controlled experiments, we evaluate whether four types of common model-agnostic explainable AI methods satisfy these properties on two types of decision-making tasks where people perceive themselves as having different levels of domain expertise in (i.e., recidivism prediction and forest cover prediction). Our results show that the effects of AI explanations are largely different on decision making tasks where people have varying levels of domain expertise in, and many AI explanations do not satisfy any of the desirable properties for tasks that people have little domain expertise in. Further, for decision making tasks that people are more knowledgeable, feature contribution explanation is shown to satisfy more desiderata of AI explanations, while the explanation that is considered to resemble how human explain decisions (i.e., counterfactual explanation) does not seem to improve calibrated trust. We conclude by discussing the implications of our study for improving the design of XAI methods to better support human decision making.

齊紫淩同學介紹了論文《O2O外賣價格促銷策略對消費者購買意願的影響研究》，在後疫情時代，O2O外賣行業如何通過差異化促銷策略提升用戶體驗、提高購買意願，是O2O外賣平台和餐飲商家十分關注的問題。本文系統梳理O2O外賣13種常見價格促銷方式，并将其歸納為優惠券、折扣、附加服務費優惠三類促銷策略，基于刺激-機體-反應模型（SOR模型），引入感知促銷價值因素，建立O2O外賣價格促銷策略對消費者購買意願影響機制的理論模型；通過問卷星在線收集567份樣本數據并進行結構方程模型分析，實證檢驗O2O外賣不同價格促銷策略對潛在消費者購買意願的影響路徑和作用機制，并驗證感知促銷利益和感知促銷成本的中介效應。分析實證研究結果發現，在三類價格促銷策略中，優惠券類促銷策略對潛在消費者購買意願的影響最大；附加服務費優惠策略對于O2O外賣消費者的購買意願影響不大；與優惠券策略直接促使消費者做出購買決策不同，折扣策略下消費者需要對感知促銷成本和感知促銷利益做出權衡後做出最終購買決策。研究結論為O2O外賣平台和餐飲商家改進現有促銷策略提供理論依據和參考。

評委老師與兩位主講同學展開了熱烈的讨論，并提出了許多專業性、建設性的問題與建議，參加學術沙龍的同學們也積極提問，學習兩位主講人的研究思路、經驗與方法，通過知識分享共同提升自己的研究水平。随後評委老師對本次沙龍進行了總結并鼓勵大家在學術方面敢于思考，勇于提問。永利官网研究生2022年度第9期“崇德”學術論壇在同學們的交流與老師們的指導中圓滿結束。