You
want to look at the relationship between corporal punishment and
depression, so you measure these both in a group of children and then see
how they relate to each other. This would be ___________________ design which means
you ________ conclude that one variable causes the other to
change.

a. a correlational study, can b. an experimental study, cannot

c. an experimental study, can d. a correlational study, cannot

Studying variation of two variables with each other is called a correlation study, here two variables are corporal punishment and depression. Through correlation study we can conclude that one variable causes other to change or not.

So the correct answer is a) a correlation study, can