Exam 8: Experimental and Quasi-Experimental Designs

The nurse researcher is designing a study comparing weight loss among obese subjects who participated in a weight loss support group with obese subjects who chose not to participate in a weight loss support group.Which factor or condition in the study would be considered an intervening variable?

By what specific criterion should a nurse researcher judge the results or findings of experimental research?

A nurse researcher is weighing the option of using an experimental or quasi-experimental design for a study.The researcher recognizes that quasi-experiments may lack which elements? (Select all that apply.)

Why should a nurse researcher be concerned with randomization in a study with an experimental design?

When would a quasi-experimental study design be a better choice for a research study than an experimental study design?

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

Which area(s)would be considered to be a weakness of quasi-experimental research designs? (Select all that apply.)

The nurse researcher is critiquing the research report of an experimental study.What aspect should be the primary consideration in determining the validity of the conclusions presented?

The nurse researcher is critiquing a research study that involves subjects undergoing chemotherapy for breast cancer.Which situation meets a criterion for inferring causality between performance of exercise and adaptation of the subjects receiving chemotherapy?

A research study in a laboratory setting incorporates four groups (two control and two experimental)in which only one experimental or control group set is pretested,whereas all four groups are posttested.Which description(s)of the design would be most accurate? (Select all that apply.)

Which designs would be considered experimental? (Select all that apply.)

The nurse researcher is designing a research study and is considering an experimental design.Which research activity can be expected to increase the control of a study with an experimental design?

How should the experimental treatment initiated by the researcher be described?

A study was conducted to determine whether a videotaped instruction was more effective than a pamphlet in teaching menopausal women the benefits of annual mammograms.Which condition could be considered an antecedent variable?

The nurse researcher is critiquing a research study that used an experimental research design.How can the nurse researcher know whether the study can appropriately infer causality?

Which statement about the threats to internal validity present in a quasi-experimental study using a nonequivalent control group design is most accurate?

Which statement regarding random assignment or randomization is most accurate?

A research study is being conducted to analyze the effect of nutritional supplementation and type of selected support surface on rate of wound healing in sacral myocutaneous flap failures.Which of the following variables is an independent variable in this study? (Select all that apply.)

Which study would be most effective with an after-only experimental research design?

The nurse researcher is planning a research study in which subjects will not be randomly assigned to groups.Which type of quasi-experimental design would be most appropriate for this study?