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Nielsen Media Research Use Mechanical Observational Data Collected by a "People

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Nielsen Media Research use mechanical observational data collected by a "people meter." By 2011, Nielsen will implement a new measurement program dubbed the

Understand the concept of fertility rates and how they are calculated.
Grasp the social and economic factors leading to changes in population trends.
Understand the concept of private speech and its association with cognitive development theories.
Recognize the significant contributors to the field of cognitive development and their foundational ideas.

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