Question

The correlation between intelligence test scores of identical twins is ______.

1. higher when they are raised together than when they are raised apart.
2. greater than that for fraternal twins raised together.
3. lower than that for any other blood relatives.
4. the same whether they are reared together or apart.

Choose the correct option:

Options

• i and iii

• i and ii

• iii and iv

• i and iv

Answer 1

i and ii