How are you operationalizing "maturity", and what data supports your conclusion of ages for reaching this maturity? Typically studies of brain myelination, whi

How are you operationalizing "maturity", and what data supports your conclusion of ages for reaching this maturity? Typically studies of brain myelination, which is often used as marker for "maturity", show a linear progression until about 30 without a significant difference across sex or gender. However, they are usually quick to point out that myelination does not necessarily equal cognitive, emotional, and social maturity.