1' One shot case study

1
1. One shot case study
X O
Weaknesses History Selection/mortality
Generally not scientific
2
2. One-group pretest-posttest design
O X O
Weaknesses History Maturation
Testing Instrumentation Interaction
between testing and intervention
3
3. Static group comparison
Weaknesses Selection Mortality
4
4. Pretest-posttest control group design
R O X O R O O
Weaknesses Interaction of testing and
treatment Interaction of selection and
treatment Reactive arrangements
5
6. Posttest-onlycontrol group design
R X O R O
No general weaknesses Sometimes not feasible
6
7. Time-series experiment
O O O O X O O O O
Weaknesses History Interaction between
testing and intervention
7
10. Nonequivalentcontrol group design
Weaknesses Regression Interaction
between testing and treatment