Object permanence begins at around 4 months of age and is complete at around 12 months of age. What is object permanence? Simply put, it is the ability to understand that people or objects exist even ...

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Object permanence, as many will remember from college psychology class, refers to the understanding that things and people continue to exist even when you can’t see or hear them. First documented by ...

Originally from Seattle, Washington, Madison now lives in The Netherlands with her husband and their terrier Hyperion. When not doing freelance writing, Madison loves playing video games, crafting, ...