المشاركة الأصلية كتبت بواسطة pinkoOo

24- if you want to compare groups over time , then your design is :
A- within groups

24- a

لان
:Between Groups Designs
Compare it to another group (two groups)

:Within Group Designs
Can compare one group to itself over time

Cross-sectional method
- Same group of people are observed at one point in time

Longitudinal method
- Same group of people are observed at different points in time as they grow older

اعتقد ان الخطأ في السؤال لان ما حدد عدد groups :/