In clinical trials involving tests of new medical treatments, it may be extremely difficult to get patients to agree to be randomly assigned to either the treatment or the control group. In these situations researchers can use
A. natural groups designs.
B. quasi-experimental designs.
C. yoked control designs.
D. matched groups designs.
B. quasi-experimental designs.
You might also like to view...
The text generally recommended against formal procedures for finding an optimal regression procedure because
a. those procedures don't work. b. those procedures pay too much attention to chance differences. c. the statistical software won't handle those procedures. d. all of the above
Which of the following is the maximum value for a correlation coefficient?
a. +0.50 b. +0.90 c. +1.00 d. +5.00
The matching hypothesis suggests that we are likely to end up with someone __________
a) high in altruism. b) who is slightly more popular than we are. c) similar to ourselves in attractiveness. d) who possesses traits we wish we had.
An improved ability to reason about social relationships leads teenagers to __________
A) rely more on parental support B) view their parents as “just people” C) solve problems less efficiently D) idealize their parents