Infant's Cognitive Development: Language Development

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Cognitive development-language development Infancy: At this stage, infants have no language and thinking. Babble is increasingly being understood as an essential precursor to speech. They explore the surrounding environment by feeling and action, and form the concept of object permanence gradually. They have sharp sense of hearing, are good at imitating. Infants could distinguish the change in tone, tone and tone. A nine-month infants can understand some nouns, such as "mom", "ball", "dog" and so on. In general, a twelve-month infant can say at least 50 words. Preschool age: 3-year-old children's vocabulary growth is the high-speed period. 3-5years old children can use simple sentences and complex sentences. They master most of the grammatical
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