生得説アプローチ

The nativist approach proposes that infants are born with significant innate knowledge and understanding of the world rather than acquiring it gradually through experience. This perspective contrasts with earlier theories like Piaget's theory of cognitive development from childhood into adulthood, which emphasized gradual learning. Nativists argue that infants possess prewired cognitive structures that help them interpret their environment from birth.

Object permanence is the understanding that objects continue to exist even when out of sight. Nativist research shows infants as young as three to four months expect objects to be substantial and permanent, challenging Piaget's claim that this ability emerges between five to eight months. This early competence suggests object permanence is an innate cognitive capacity rather than a learned skill.

Elizabeth Spelke's core knowledge theory proposes that infants possess domain-specific knowledge systems at birth, including understanding of space, numerical sense, object permanence, and language. These specialized cognitive processes are evolutionarily adapted to help infants survive and interact with their surroundings. Core knowledge forms a foundation for developing more advanced cognitive abilities and complex learning throughout development.

Evolutionary theory supports nativism by suggesting that certain knowledge domains are prewired in infants because they provided survival advantages. Cognitive structures like spatial awareness, numerical sense, and object permanence evolved to equip humans with survival-relevant skills from an early age. This evolutionary perspective explains why infants demonstrate intuitive understanding of physical properties and environmental relationships without explicit instruction.

Critics argue that the nativist approach overemphasizes internal cognitive processes while overlooking the powerful influence of social and environmental factors on infant development. Although innate structures may guide infants' interactions with their surroundings, external factors—particularly social interactions—play a significant role in shaping and enhancing early cognition. This critique suggests a more balanced view incorporating both nature and nurture is necessary.

According to nativist theory, infants are born with four primary domain-specific knowledge systems: object representation, spatial navigation, numerical sense, and language. Each domain contains specialized cognitive processes that prepare infants for survival and environmental interaction. These systems allow infants to interpret basic environmental cues and form the foundation for more complex learning and cognitive development.

Nativist research reveals that infants possess cognitive abilities much earlier than Piaget proposed. For example, infants demonstrate object permanence by three to four months, whereas Piaget suggested this ability emerges between five to eight months through environmental interaction. Nativists attribute these early competencies to innate knowledge structures rather than gradual learning through sensorimotor experience.