Subject relative clauses (RCs) have been shown to be acquired earlier, comprehended more accurately, and produced more easily than object RCs by children. While this subject preference is often claimed to be a universal tendency, it has largely been investigated piecemeal and with low-powered experiments. To address these issues, this meta-analysis follows an established and rigorous scientific method to test the generalizability of the subject preference in RC acquisition by evaluating the collective evidence. While the results show a significant crosslinguistic subject preference, there is a large amount of heterogeneity in the data. The manifestation of this subject preference may not be uniform across languages, depending on typological properties such as language headedness, RC headedness, and main clause similarity. The true impact of these features, however, requires research on more typologically diverse languages.

中文翻译：

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论跨语言关系从句习得中主语偏好的普遍性

事实证明，儿童比宾语关系从句 (RC) 更早获得、理解更准确、更容易产生。虽然这种主题偏好通常被认为是一种普遍趋势，但它在很大程度上是通过低强度实验进行零碎研究的。为了解决这些问题，本荟萃分析遵循既定且严格的科学方法，通过评估集体证据来测试 RC 习得中受试者偏好的普遍性。虽然结果显示出显着的跨语言主题偏好，但数据中存在大量异质性。这种主语偏好的表现在不同语言中可能并不统一，具体取决于类型学属性，例如语言中心词、RC 中心词和主句相似性。然而，这些功能的真正影响需要对类型更加多样化的语言进行研究。