This research uses high-density anonymised mobile phone application (MPA) global-positioning system (GPS) data to describe exposure to racial diversity in different social contexts with an aim to clarify the mechanism linking residential diversity to opportunities for diverse social interactions. In particular, it explores the hypothesis that a diverse residential context does not lead to diverse social contact by comparing three exposure measures – residential, observed and interaction – on the census block group level in Chicago. In doing so, it also explores the contribution of activity spaces to opportunities for diverse social contact. The findings show that the exposure to opportunities for diverse social contact measured by MPA data is generally higher than what is implied by residential census data, especially in areas of high residential segregation in the city. Further, measures using MPA data reveal more spatiotemporal heterogeneity of exposure than that implied by the residential context.

本研究使用高密度匿名手机应用程序 (MPA) 全球定位系统 (GPS) 数据来描述不同社会背景下种族多样性的暴露情况，旨在阐明将居住多样性与多样化社会互动机会联系起来的机制。特别是，它通过比较芝加哥人口普查街区组级别的三种暴露措施——居住、观察和互动，探索了多样化的居住环境不会导致多样化的社会接触的假设。在此过程中，它还探索了活动空间对多样化社会接触机会的贡献。调查结果表明，MPA 数据衡量的多样化社会接触机会的暴露程度通常高于住宅人口普查数据所暗示的水平，尤其是在城市中居住高度隔离的地区。此外，使用 MPA 数据的测量揭示了暴露的时空异质性，而不是住宅环境所暗示的。