Developmental psychology uses the term "object permanence," which can also refer to "object persistence." This concept refers to an infant's ability to recognize that an object still exists even when it is hidden or moved out of sight, hearing, or sight. As children grow older, this cognitive skill develops, indicating that they begin to understand the permanence of objects in the physical world. From simple reflexive behaviors to complex symbolic reasoning, children's perception of the world is based on their understanding of object permanence.

Phases in which Object Persistence Develops

Developmental scientist Jean Piaget thought the sensorimotor stage (0-2 years) being the best for developing object permanence. During this phase, babies use their senses and their bodies to investigate their surroundings, and gaining the ability to perceive objects as permanent is a significant achievement. The following phases can be used to categorize object persistence development:

Reflex stage (0-1 month): During this stage, infants mainly rely on reflexes to respond to external stimuli and have not yet shown an understanding of object permanence.

Primary circular reaction stage (1-4 months): Infants begin to take an interest in their bodies and perform repetitive actions, such as sucking their fingers. At this time, their object permanence is still limited, but they may begin to show more interest in objects.

Secondary circular reaction stage (4-8 months): This is a critical period for the development of infants' object permanence. During this stage, infants begin to pay attention to objects and behaviors that have an impact on the outside world. They may briefly look for hidden objects, showing a preliminary understanding of object permanence.

Coordinated secondary reaction stage (8 months and above): As infants' cognitive abilities develop further, they begin to be able to look for hidden objects for longer periods of time and have a deeper understanding of object permanence.

Why Parents Should Foster Object Permanence Cognition？

The cognitive development of object permanence lays the foundation for infants' later spatial thinking and language development. By perceiving the existence and disappearance of objects, infants gradually understand spatial relationships, which plays an important role in promoting their spatial cognition and logical thinking.

The cognitive development of object permanence helps infants establish stable emotional bonds. When infants realize that objects still exist after being blocked or moved, they begin to form emotional attachments to people and objects, which helps infants establish a stable emotional connection with their caregivers. The recognition of object permanence also helps to reduce infants' separation anxiety. Infants can understand that even if their caregivers temporarily leave their sight, they still exist, which helps infants build a sense of security and promotes the development of psychological health.

Recognizing the permanence of objects is the basis for infants to determine the relationship between signifiers and signifieds in the objective world, and it is also a prerequisite for language acquisition. Only when infants realize that things that are not in front of them still exist, the use of personal terms and nouns to refer to different things has a definite meaning, which prepares infants for learning language.

How to Help Infants Develop Object Permanence?

Play hide-and-seek: This is a classic game to help infants understand object permanence. Parents can cultivate their object permanence cognition by hiding toys and encouraging infants to find them.

Use an obstruction: Place an obstruction, such as a piece of cloth or cardboard, in front of the infant, and then move the object behind the obstruction. Observe whether the infant will try to bypass the obstruction to find the object.

Provide multi-sensory stimulation: Help babies perceive and understand objects more comprehensively by providing multiple sensory stimulations such as vision, hearing and touch.

Parents can help babies better develop object permanence cognition by playing hide-and-seek games, using cover objects and providing multi-sensory stimulation. At the same time, we should also understand that each baby may develop at a diffe