Pedro and Juan are identical twins living in the same crowded orphanage, where they receive little attention from the caregivers. Pedro is adopted at age six and Juan not until age thirteen. Pedro is able to catch up with his peers in terms of language development; Juan is not. In contrast to Juan, Pedro was adopted before the ____.

Question

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Pedro was adopted before the "sensitive period," a timeframe during which the human brain is particularly receptive to learning specific skills, such as language. Being adopted earlier allowed Pedro to benefit from this period, unlike Juan, who was adopted after this crucial developmental window had closed, making it harder for him to catch up in language development.

Pedro and Juan Are Identical Twins Living in the Same