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We always remember the past, reflect on ourselves, expect the future, and read others mind. These cognitive processes come to the surface of infants' engagement with the environment at about 1.5 years... of age. Nevertheless, there appear to be few discussions on these cognitive processes at about 1.5 years of age in the perspective of representational function. I first review and evaluate various empirical studies on object permanence, pretense, planning, understanding external representations, and understanding self and others during the second year. Next, I consider each of cognitive abilities at about 1.5 years of age by Perner's (1991) secondary representation. Finally, I pay attention to how the second representation emerges, and then present the future direction of studies on cognitive development during the second year.続きを見る
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