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A child's brain fully develops by age 25
Brain research shows that the human brain goes through a slow maturation process between ages 10 through 25. The emotional make-up of a child is generally fully developed by age five.

A Dartmouth College study reveals there is a significant shift in a person’s brain after age 18, when the individual is emerging into young adulthood.

The human brain reportedly becomes fully developed at age 25.

Prior to full brain development children exhibit the following behaviors more coincidentally vs. consistently:
• Decision making
• Use of appropriate judgment
• Rational thinking
• Integration of emotion & critical thinking
• Ability to think clearly about long-term outcomes that stem from behaviors
• Global thinking vs. self-centered thinking

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http://www.examiner.com/parenting-education-in-newark/a-child-s-brain-fu...