Exam 9: Experimental and Quasi-Experimental Designs

In a study using a true experimental design, which of these methods would control for antecedent variables?

Which of these criteria is most important when evaluating the results of an experimental research study?

The nurse is critiquing a research study that used an experimental design. How can the nurse determine if the study's results are able to infer causality?

A research study in a laboratory setting incorporates four groups (two control and two experimental) in which only one experimental group and one control group are pretested, while all four groups are posttested. Which descriptions of the design are accurate? (Select all that apply.)

Compared with a quasi-experimental design, which of these characteristics should a nurse expect to see only in a true experimental design?

Which research designs could be classified as experimental? (Select all that apply.)

A study was conducted to determine if videotaped instruction was more effective than written instruction (a pamphlet) to teach menopausal women the benefits of regular mammograms. Which condition would be considered an antecedent variable?

How are threats to validity affected when studies are conducted in laboratory settings?

The nurse is critiquing a research study that involves subjects undergoing chemotherapy for breast cancer. Which finding would meet a criterion for inferring causality between performance of exercise and adaptive behavior of the subjects receiving chemotherapy?

A planned quasi-experimental study using a nonequivalent control group design has several extraneous variables that threaten its internal validity. The nurse researcher's actions should be based on which understanding?

Which are characteristics of quasi-experimental research designs that are considered $\bold{weaknesses}$ , compared with experimental designs? (Select all that apply.)

Randomization strengthens an experimental study in which of these ways?

The experimental treatment initiated by a researcher can be described as what kind of variable?

Random assignment of subjects to experimental and control groups has which of these effects?

Which factor should be the primary consideration when determining the validity of experimental study findings?

A study of a program to help people quit cigarette smoking had three groups of subjects. The first group received one supportive phone call 10 days after attending a program on strategies to resist smoking. A second group received a supportive phone call every week for 6 weeks after attending the program. A third group received no supportive phone calls after attending the program. -In the above scenario, which of these properties of experimental research is evident?

An after-only nonequivalent control group design would be appropriate to study which of these research questions?

Which of these research designs could be classified as quasi-experimental? (Select all that apply.)

How are threats to validity affected when studies are conducted in real-world settings?

In a true experimental study, the control group is the group that does what?