How item discovery enabled by diversity leads to increased recommendation list attractiveness

B. Ferwerda, Mark P. Graus, Andreu Vall, M. Tkalcic, M. Schedl
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引用次数: 17

Abstract

Applying diversity to a recommendation list has been shown to positively influence the user experience. A higher perceived diversity is argued to have a positive effect on the attractiveness of the recommendation list and a negative effect on the difficulty to make a choice. In a user study we presented 100 participants with several personalized lists of recommended music artists varying in levels of diversity. Participants were asked to assess these lists on perceived diversity and attractiveness, the experienced choice difficulty and discovery (i.e., the extent the list enriches their taste). We found that recommendation list attractiveness is influenced by two effects: 1) by diversity mediated through discovery; diverse recommendation lists are perceived to be more attractive if they enrich the user's taste or 2) by the list familiarity; a higher list familiarity contributes to a higher list attractiveness. We additionally revealed how individual differences (i.e., familiarity) moderate the effects found. Our results have implications on the composition of diversified recommendation lists. Specifically recommended items should contribute in extending and/or deepening the user's taste for the diversification to be effective.
多样性所带来的项目发现如何增加推荐列表的吸引力
将多样性应用于推荐列表已被证明对用户体验有积极影响。较高的感知多样性被认为对推荐列表的吸引力有积极影响,对做出选择的难度有消极影响。在一项用户研究中,我们向100名参与者提供了几个个性化的推荐音乐艺术家列表,这些列表的多样性程度各不相同。参与者被要求根据感知到的多样性和吸引力、体验到的选择难度和发现程度(即列表丰富他们品味的程度)来评估这些列表。研究发现,推荐列表吸引力受两种效应的影响:1)发现介导的多样性效应;如果多样化的推荐列表丰富了用户的口味,那么它们会被认为更具吸引力;更高的列表熟悉度有助于更高的列表吸引力。我们还揭示了个体差异(即熟悉程度)如何缓和所发现的影响。我们的研究结果对多元化推荐列表的构成具有启示意义。特别推荐的项目应该有助于扩展和/或加深用户的口味,以使多样化有效。
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