Infant's facial expressions of sadness, fear, and anger can be differentiated by the time they are a few weeks old.

Name: Infant's facial expressions of sadness, fear, and anger can be differentiated by the time they are a few weeks old.
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Question

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Infants' facial expressions of sadness, fear, and anger are not easily differentiated until they are a few months old, as their emotional expressions are initially more generalized.

Infant's Facial Expressions of Sadness, Fear, and Anger Can Be