The concept that preschool-age children believe that differences in sex are based not on biological factors but on the differences in boys' and girls' appearance and/or behavior(s) is expressed by what researcher and theory?

Most mentally ill persons who were confined to the earliest mental institutions were treated

a. humanely but with primitive methods. b. inhumanely. c. by members of the clergy who used talking cures. d. with a combination of drugs and therapy. e. with an eclectic form of therapy that emphasized personal worth.

She became the first female president of the American Psychological Association in 1905

a) Margaret Floy Washburn b) Francis Sumner c) Mary Whiton Calkins d) Christine Ladd-Franklin