In one study, children who spent their first 19 months of life in an overcrowded and understaffed orphanage experienced major increases in IQ after being moved to an environment that provided individual care. Findings such as these:

Question

Quizplus · Accepted Answer

The findings raise questions about critical periods in human development, as they show that significant improvements in IQ can occur even after early adverse conditions, suggesting flexibility in developmental timing.

In One Study, Children Who Spent Their First 19 Months