威斯人所有官方网站于10月6日在阳光校区7-536举办了2022年第9期“崇德”学术沙龙。郎乔奇博士和孙昳副教授参与主持此次学术沙龙论坛并发表点评。本次学术沙龙论坛由喻学良、齐紫凌同学主讲。威斯人所有官方网站部分研究生积极参加了此次活动。

喻学良同学介绍了论文《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.

齐紫凌同学介绍了论文《O2O外卖价格促销策略对消费者购买意愿的影响研究》，在后疫情时代，O2O外卖行业如何通过差异化促销策略提升用户体验、提高购买意愿，是O2O外卖平台和餐饮商家十分关注的问题。本文系统梳理O2O外卖13种常见价格促销方式，并将其归纳为优惠券、折扣、附加服务费优惠三类促销策略，基于刺激-机体-反应模型（SOR模型），引入感知促销价值因素，建立O2O外卖价格促销策略对消费者购买意愿影响机制的理论模型；通过问卷星在线收集567份样本数据并进行结构方程模型分析，实证检验O2O外卖不同价格促销策略对潜在消费者购买意愿的影响路径和作用机制，并验证感知促销利益和感知促销成本的中介效应。分析实证研究结果发现，在三类价格促销策略中，优惠券类促销策略对潜在消费者购买意愿的影响最大；附加服务费优惠策略对于O2O外卖消费者的购买意愿影响不大；与优惠券策略直接促使消费者做出购买决策不同，折扣策略下消费者需要对感知促销成本和感知促销利益做出权衡后做出最终购买决策。研究结论为O2O外卖平台和餐饮商家改进现有促销策略提供理论依据和参考。

评委老师与两位主讲同学展开了热烈的讨论，并提出了许多专业性、建设性的问题与建议，参加学术沙龙的同学们也积极提问，学习两位主讲人的研究思路、经验与方法，通过知识分享共同提升自己的研究水平。随后评委老师对本次沙龙进行了总结并鼓励大家在学术方面敢于思考，勇于提问。威斯人所有官方网站研究生2022年度第9期“崇德”学术论坛在同学们的交流与老师们的指导中圆满结束。