1) In nonequivalent control group designs, the comparison group is selected by using: 2. True experiments are designed to maximize:
Two types of before-and-after experimental designs in which multiple pretest and posttest observations are made of the same group are:
A university conducts a series of surveys in which subjects are drawn from first year and graduating students and finds that graduating students demonstrate much higher rates of approval for the university (in terms of whether they think the classes were relevant, the instructors were competent, etc.) The university then claims that more experience with the university leads to higher approval. What source of
Researcher V wants to compare similar drunk driving laws in several states. She selects states that have similar median incomes, automobile fatalities per capita, and car ownership per capita. She has attempted to match states using what technique?
Which of the following is NOT a source of non-comparability between comparison groups?
A researcher randomly assigns people into two groups: one that will receive the experimental treatment and one that will not. The group that receives the treatment is called the
Which of the following is FALSE about a factorial survey:
If researchers have evidence that some treatment will produce benefits for participants, but they do not have the financial resources to administer it to all subjects, what is an ethical way to distribute the benefits without compromising the strength of experimental design?
A researcher is concerned that gender may affect how subjects respond to an experimental stimulus. So subjects are paired with another subject who has the same gender, and one member from each pair is assigned by a flip of a coin to the experimental group and one to the control group. This method of assigning subjects to groups is called:
A researcher is asked to distribute medication to the participants of a study. Although each cup of medication is labeled with the participant's number, neither the researcher nor the participants know who is getting the placebo and who is getting the actual treatment. What type of experimental method does this example illustrate?
A true experiment must have all of the following EXCEPT:
Schutt indicates that the "Achilles heel" of true experimental design is:
Differential attrition in comparison and experimental groups creates what type of internal invalidity?