Because of the principle of ____, incomplete figures are seen as complete.?

A strong piece of evidence that genes alone do not cause the vast majority of mental disorders is that genetic studies

a. rely too much on twin studies and not enough on adoption studies. b. rely too much on adoption studies and not enough on twin studies. c. typically find concordance rates for DZ twins far below 100 percent. d. typically find concordance rates for MZ twins far below 100 percent.

What is the number of commercials—which consist mostly of advertisements for toys, cereal, candy and fast food—that the average child sees per year in the United States?

a. 400 b. 4,000 c. 40,000 d. 400,000