Which of the following groups shows the LOWEST correlation with respect to intelligence?
A) fraternal twins reared together
B) fraternal twins reared apart
C) identical twins reared apart
D) non-twin siblings reared together

Question

Quizplus · Accepted Answer

Non-twin siblings reared together have the lowest correlation with respect to intelligence because they only share approximately 50% of their genes and have different environmental influences. Fraternal twins share approximately 50% of their genes and have similar environmental influences if they are raised together or apart. Identical twins share 100% of their genes but may have varying environmental influences if they are raised together or apart.

Which of the Following Groups Shows the LOWEST Correlation with Respect