A researcher records participants' weights every Friday for three weeks prior to administering a diet education program and for three weeks following the program.This study is an example of a(n)____.
A)time-series design
B)interrupted time-series design
C)cross-sectional design
D)longitudinal design

Question

A researcher records participants' weights every Friday for three weeks prior to administering a diet education program and for three weeks following the program.This study is an example of a(n)____.
A)​time-series design
B)​interrupted time-series design
C)cross-sectional design
D)​longitudinal design

Quizplus · Accepted Answer

A time-series design involves collecting data on the same variable over a period of time. In this study, the researcher is collecting data on participants' weights every Friday for three weeks before and after the program. Therefore, it is an example of a time-series design. The other options are not appropriate as they do not involve collecting data over time or manipulating an independent variable.

A Researcher Records Participants' Weights Every Friday for Three Weeks