This meta‐analysis examined associations between the quantity and quality of parental linguistic input and children’s language. Pooled effect size for quality (i.e., vocabulary diversity and syntactic complexity; k = 35; N = 1,958; r = .33) was more robust than for quantity (i.e., number of words/tokens/utterances; k = 33; N = 1,411; r = .20) of linguistic input. For quality and quantity of parental linguistic input, effect sizes were stronger when input was observed in naturalistic contexts compared to free play tasks. For quality of parental linguistic input, effect sizes also increased as child age and observation length increased. Effect sizes were not moderated by socioeconomic status or child gender. Findings highlight parental linguistic input as a key environmental factor in children’s language skills.

中文翻译：

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将父母语言输入的质量和数量与儿童语言技能联系起来：一项荟萃分析

这项荟萃分析检查了父母语言输入的数量和质量与儿童语言之间的关联。质量的合并效果大小（即词汇多样性和句法复杂性；k  = 35；N  = 1,958；r  = 0.33）比数量（例如，单词/代词/发音的数量；k  = 33；N  = 1411; ř = .20）的语言输入。对于父母语言输入的质量和数量，在自然主义情境中观察到的输入与自由活动相比，效果大小更强。对于父母语言输入的质量，效果大小也随着儿童年龄和观察长度的增加而增加。效应的大小未根据社会经济状况或儿童性别进行调整。调查结果强调父母的语言输入是儿童语言技能的关键环境因素。