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Object Permanence
The understanding that objects continue to exist even when they cannot be seen, heard, or otherwise sensed, a concept developed in early infancy.
Insecure Attachment
A problematic bond between a child and caregiver characterized by fear, anxiety, or uncertainty.
Conservation
The principle in cognitive development where a child understands that quantity remains the same despite changes in its shape or form.
Asperger Syndrome
A developmental disorder characterized by significant difficulties in social interaction and nonverbal communication, along with restricted and repetitive patterns of behavior and interests.
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