| Example: food
aversion therapy |
|
|
|
| Classic |
||
| experimental |
||
| design |
||
| Time |
| Pretest |
| Posttest |
|
|
| Experimental |
|
| group |
|
| R |
| O1=0 |
| X |
| O2=10 |
| O2-O1=10 |
|
|
| Control |
|
| group |
|
| R |
| O3=0 |
| O4=30 |
| O4-O3=30 |