Bilingualism is a multifaceted experience that researchers have examined using various questionnaires to gain insights and characterize the experience. However, there are several issues related to questionnaire choice. To address this, we applied Content Overlap Analysis to seven prevalent bilingualism questionnaires, assessing their affinity. We found little overlap in these questionnaires; most had fewer than 15% of items in common, suggesting they capture different aspects of the bilingual experience and provide complementary rather than redundant data for researchers. Our investigation highlights the importance of choosing a bilingualism assessment tool to carefully fit research questions and sample language experiences.

双语是一种多方面的体验，研究人员使用各种问卷进行了研究，以获得见解并描述这种体验。但是，有几个问题与问卷选择有关。为了解决这个问题，我们将 Content Overlap Analysis 应用于 7 份流行的双语问卷，评估它们的亲和力。我们发现这些问卷几乎没有重叠;大多数项目的共同点不到 15%，这表明它们捕捉了双语体验的不同方面，并为研究人员提供了互补而不是冗余的数据。我们的调查强调了选择双语评估工具以仔细拟合研究问题和样本语言经验的重要性。