Diversity is a commonly known principle in the design of recommender systems, but also ambiguous in its conceptualization. Through semi-structured interviews we explore how practitioners at three different public service media organizations in the Netherlands conceptualize diversity within the scope of their recommender systems. We provide an overview of the goals that they have with diversity in their systems, which aspects are relevant, and how recommendations should be diversified. We show that even within this limited domain, conceptualization of diversity greatly varies, and argue that it is unlikely that a standardized conceptualization will be achieved. Instead, we should focus on effective communication of what diversity in this particular system means, thus allowing for operationalizations of diversity that are capable of expressing the nuances and requirements of that particular domain.

翻译：多样性是推荐系统设计中广为人知的原则，但其概念化却存在歧义。通过半结构化访谈，我们探究了荷兰三家公共服务媒体组织的从业者在其推荐系统范围内如何概念化多样性。我们概述了他们在系统中实现多样性的目标、相关维度以及推荐应如何多样化。我们表明，即使在这一有限领域内，多样性的概念化也差异巨大，并论证实现标准化概念化不太可能。相反，我们应聚焦于有效沟通该特定系统中多样性的含义，从而允许能够表达该领域细微差别与需求的多样性操作化方案。