Twins separated early in childhood show considerable similarity in their intellectual personality and behavioural characteristics. The intelligence of identical twins reared in different environments correlate ______.

0.72

The correct answer is Option (4) → 0.72

The intelligence of identical twins reared together correlate almost 0.90. Twins separated early in childhood also show considerable similarity in their intellectual, personality and behavioural characteristics. The intelligence of identical twins reared in different environments correlate 0.72, those of fraternal twins reared together correlate almost 0.60, and those of brothers and sisters reared together correlate about 0.50, while siblings reared apart correlate about 0.25.