According to Piaget, what stage of cognitive development do infants undergo?

Infants undergo the sensorimotor stage of cognitive development, which is the first of Piaget's four stages. This stage lasts from birth to approximately two years of age. During the sensorimotor stage, infants learn about the world primarily through their senses and motor activities. They engage with their environment by looking, touching, sucking, and manipulating objects, which helps them explore and begin to understand basic concepts such as cause and effect, object permanence, and the permanence of the objects they can no longer see.

A key aspect of this stage is that infants learn through direct interaction with their surroundings. They develop critical capabilities, such as understanding that objects continue to exist even when they are out of sight, which is known as object permanence. This understanding is a foundational cognitive development milestone that demonstrates the capacity for internal mental representation, setting the stage for more complex cognitive skills that emerge in later stages as they continue to grow and learn.