A child's ability to watch something change and then realize that the transformation could be undone is called

Questions about the nature and distribution of childhood disorders are frequently addressed through ____

a. epidemiological research b. regression analysis c. correlation studies d. efficacy studies

Which of the following is the safest assumption about the size of the effect you are testing?

a. It is moderate. b. It is small. c. It is large. d. There is no effect