A researcher compares sleep patterns among patients with breathing problems for seven nights before and seven nights after a new treatment is implemented (by the researcher) to improve patient sleeping. Changes in sleeping patterns from before to after the treatment were compared. What type of quasi-experimental research design is described in this example?
A. interrupted time series
B. basic time series
C. one-group pretest–posttest design
D. nonequivalent control group pretest–posttest design
Ans: B
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