A nurse researcher is planning a quantitative (experimental) research study to test the effect of a new wound product on wound healing. Which of these factors is necessary to implement an experimental pretest-posttest design? (Select all that apply.)
a. Inclusion of a second control group
b. Ability to collect pretest data
c. Use of two posttreatment data collection times
d. Subjects randomized to the control group only
e. Random assignment of subjects to treatment and control groups
ANS: B, E
Feedback
Correct To implement a pretest-posttest design, it must be possible to collect pretest data.
Random assignment must be possible for both treatment and control groups.
Incorrect There is no need for a second control group for a pretest-posttest design.
There is no need for two posttreatment data collection times; only one is needed.
Randomization must be possible for both treatment and control groups.
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