由于婴儿不能用语言表达或填写调查问卷，自然观察法的间接技巧被用来作为判断他们能看到、听到、感觉到什么等等的主要手段。
Because they cannot verbalize or fill out questionnaires, indirect techniques of naturalistic observation are used as the primary means of determining what infants can see, hear, feel, and so forth.
在研究中使用自然观察法最大的优势是研究人员可以观察到被试在自然环境中的行为。
The biggest advantage of the naturalistic method of research is that researchers view participants in their natural environments.
在研究中使用自然观察法最大的优势是研究人员可以观察到被试在自然环境中的行为。
The biggest advantage of the naturalistic method of research is that researchers view participants in their natural environments.
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