An Infant, Betty, Has a Colorful Mobile Suspended Over Her

An infant, Betty, has a colorful mobile suspended over her crib. There is a sensing device under her pillow so that when Betty moves her head, the mobile turns and its colorful shapes move enticingly. Betty enjoys making the mobile move and she smiles whenever the mobile is in motion. Betty's twin brother, Frank, has an identical mobile suspended over his crib. However, Frank's mobile moves only when Betty sets hers in motion. Based on what you know about response control, what is the most likely outcome in this situation?

A) Betty will pay less attention to the mobile than Frank because the movements of hers are predictable.
B) Betty will have intelligence scores that are significantly higher than Frank's when the twins are about 2 years old.
C) Frank will lose interest in the movements of his mobile while Betty will continue to enjoy hers.
D) Frank will attempt to reach out and grasp the colorful shapes in motion above his crib, while Betty will just move her head to set her mobile in motion.

Correct Answer:

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