We propose X-index -- the proportion of papers' citations coming from outside their research field -- and use this metric to analyze citations of CHI, UIST, and CSCW papers between 2010 and 2022. We found an overall decreasing X-index by several measures, indicating that HCI papers have been more and more likely to be cited by HCI papers rather than by non-HCI papers.

翻译：我们提出X-index——衡量论文引用中来自本领域之外的比例——并利用这一指标分析2010至2022年间CHI、UIST及CSCW论文的引用情况。通过多种测量方式，我们发现X-index整体呈下降趋势，这表明人机交互领域论文越来越倾向于被人机交互领域论文引用，而非非人机交互领域论文引用。