What would a positive correlation between brain size and intelligence mean as revealed by MRI scans?
A) brain size alone determines intelligence
B) there is a relationship between brain size and intelligence
C) greater use of the brain makes it grow in size
D) mentally retarded individuals have the smallest brains

Question

Quizplus · Accepted Answer

A positive correlation between brain size and intelligence as revealed by MRI scans would mean that as brain size increases, intelligence also tends to increase. However, this does not mean that brain size alone determines intelligence or that mentally retarded individuals have the smallest brains. It also does not necessarily mean that greater use of the brain makes it grow in size, as correlation does not imply causation.

What Would a Positive Correlation Between Brain Size and Intelligence