Twin studies are a kind of a

Annie wants to find the first source that established social psychology as a separate field with an emphasis on experimentation and the scientific method. What should she probably read?

a. Allport's (1924) text b. Ringelmann's (1913) article c. McDougall's (1908) text d. Triplett's (1897–1898) article

A group of 100 female undergraduate students are surveyed. More than half say they have been victims of sexual aggression. The men who coerced them into intercourse did so without planning to do so and manipulated them by using alcohol and interpreted their protests of sexual advances as meaning "go ahead." What, if any, aspect of this group's survey results is unusual?

a. It is unusual for most acts of rape to be unplanned. b. It is unusual for one-half of undergraduate females to report being victims of sexual aggression. c. It is unusual for men who coerce sex to use alcohol. d. It is unusual for men who coerce sex to interpret protests as insincere.