Social scientists suggested that the turbulence of the 1960s and 1970s was caused, in part, by ______.

In naturalistic observation, the practice of dichotomous recording whether a behavior occurs or not constitutes

a. cluster sampling. b. one/zero sampling. c. continuous real-time sampling. d. time-interval sampling

President __________ issued the greatest number of vetoes

a. George W. Bush c. Franklin D. Roosevelt b. Harry Truman d. Dwight Eisenhower