3 ms·
There's a control group. Both groups were watched by the experimenters. Not only that, the same teachers had students in both groups in different classes.
by 0xab 7y ago
There's a control group. Both groups were watched by the experimenters. Not only that, the same teachers had students in both groups in different classes.
- zby 7y agoBut the control group would know that nothing has changed. The group testing the new method would feel the excitement - the control group would not.