When comparing shyness scores for twins, a researcher finds a high positive correlation between pairs of twins. What does this correlation by itself mean?
A) if one twin is shy the other twin is also likely to be shy
B) if one twin is shy the other twin will be outgoing
C) shyness is inherited
D) shyness is learned

Question

Quizplus · Accepted Answer

A high positive correlation between pairs of twins means that if one twin is shy, the other twin is also likely to be shy. This suggests that there is a genetic component to shyness as identical twins share 100% of their genes, while fraternal twins share only about 50% of their genes.

When Comparing Shyness Scores for Twins, a Researcher Finds a High