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 2
Marcia is the coordinator of a hospital's on-line support group for the families of children who have a rare, incurable form of brain cancer called diffuse intrinsic pontine glioma. She is conducting a survey to evaluate the effectiveness of the support group. Given that members of the group live all over the world, her best choice for methodology is likely a(n) ____.
a. personal interview
b. e-mail questionnaire
c. group questionnaire
d. drop-off survey
16 weeks old human fetus
24 weeks old human fetus
In a developmental systems approach, the emergence of social smiling at 6 to 8 weeks of age is not ...
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