Final answer:
A child who has begun to demonstrate object permanence is in the sensorimotor stage, the first stage of Piaget's theory of cognitive development.
Step-by-step explanation:
According to Piaget's theory of cognitive development, a child who has just begun to demonstrate object permanence is in the sensorimotor stage. This stage lasts from birth to about 2 years old. In the sensorimotor stage, children learn about the world through their senses and motor behavior. Object permanence is the understanding that even if something is out of sight, it still exists.
A child who has just begun to demonstrate object permanence is in the sensorimotor stage of Piaget's stages of cognitive development. The sensorimotor stage is the first of the four stages proposed by Piaget and lasts from birth to about 2 years old. During this period, children learn about the world through their senses and motor behavior. Importantly, between 5 and 8 months old, they develop the understanding that objects continue to exist even when out of sight, known as object permanence.