The Ability of Children to Understand the Product Package: A Study of Limitations Imposed by Cognitive Developmental Stage
基于认知发展理论，通过实验室实验研究儿童对产品包装大小的理解，发现前运算阶段儿童认为包装决定内含物大小，且不理解包装大小与消费需求的比例关系，而具体运算阶段儿童则能理解。
Based on cognitive developmental theory, this study examined children's understanding of the product package in terms of size. Using a laboratory experiment with specially designed product packages, it was found that younger, preoperational children expect the package to be a determinant of the size of its contained object. Further, many children within this group did not understand the proportional relationship between package size and consumption need. Older, concrete operational children appeared to understand package size. In addition to cognitive stage, the mediating effects of ethnicity and social class were examined.