Examlex
Find the volume of the solid that is obtained by revolving the region about the x-axis.
Object Permanence
The recognition that items persist in existence even when they are not visible, audible, or detectable through other senses.
Object Permanence
The understanding that objects continue to exist even when they cannot be observed (seen, heard, touched, smelled, or sensed in any way).
Deferred Imitation
The capability of reproducing a behavior observed at an earlier time, without the immediate presence of the original stimulus.
Circular Reactions
Repetitive actions or behaviors, primarily in infants, which serve to explore and learn about the environment, and are a key part of cognitive development.
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