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.
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。
Psychologists use a range of techniques to study the human mind and behavior, including naturalistic observation, experiments, case studies and questionnaires.
心理学家使用各种技术来研究人的思想和行为，包括自然观察，实验，个案研究及问卷调查。
Of course, both naturalistic and laboratory observation are important in regard to the advancement of scientific knowledge.
当然，上述两种方法之于科学研究的进步都是极为重要的。
Of course, both naturalistic and laboratory observation are important in regard to the advancement of scientific knowledge.
当然，上述两种方法之于科学研究的进步都是极为重要的。
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