Joshua designs a research study to investigate the relationship between two variables: the size of a person's head and IQ level.He measures each variable without manipulating either of the variables and finds that IQ is higher for subjects with bigger heads.In the context of correlational research,what can Joshua conclude?

Question

Quizplus · Accepted Answer

Joshua's study shows a positive correlation between head size and IQ level, meaning that as one variable increases, so does the other. However, Joshua cannot conclude that one variable causes the other. It is possible that there is another variable (such as genetics or education) that influences both head size and IQ level. Therefore, option A and C are incorrect. Option B is incorrect because the study found a positive correlation, not a negative one.

Joshua Designs a Research Study to Investigate the Relationship Between