Since, Sally, a nine-month-old can retrieve her ball when her mother hides it under a blankets, she has known Object Permanence.
<h3>What Is Object Permanence?</h3>
Object permanence serves as a term that describes the understanding of how items and people still exist even when one can't see or hear them.
Therefore, since the girl can know where the ball was hide , she was mastering Object permanence.
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The type of psychotherapist Sonja needs to see is a psychologist
Answer:
This is called cluster sampling procedure.
Explanation:
In this type of procedure, a group of elements is considered instead of individual units. This proceddure is usually based on geography, and it's useful due to its efficiency regarding cost and time.
There are a few disadvantages, though: it might not be diverse enough to be significant, and it's possible that some elements of other groups (in this case, other districts) share some features.