A researcher finds that height and intelligence are correlated in children. The age of the child is probably which of the following?
A) A mediating variable
B) An extraneous variable
C) A common-causal variable
D) An outcome variable

Question

Quizplus · Accepted Answer

Age is likely a common-causal variable because it could be causing both height and intelligence to increase, given that as children grow older, they typically get taller and develop cognitively.

A Researcher Finds That Height and Intelligence Are Correlated in Children