What should we conclude regarding the effectiveness of treatments A and B on self-esteem if both improve significantly in the following alternative treatment groups design results?

A) Both treatments appear to be equally effective.
B) Neither treatment was effective.
C) Both treatments might be effective or ineffective because we cannot rule out some alternative explanation like history or the passage of time as a plausible cause of the improvement in both groups.
D) None of the above.

Question

What should we conclude regarding the effectiveness of treatments A and B on self-esteem if both improve significantly in the following alternative treatment groups design results?

A) Both treatments appear to be equally effective. 
B) Neither treatment was effective. 
C) Both treatments might be effective or ineffective because we cannot rule out some alternative explanation like history or the passage of time as a plausible cause of the improvement in both groups. 
D) None of the above.

Quizplus · Accepted Answer

The Answer of What should we conclude regarding the effectiveness of treatments A and B on self-esteem if both improve significantly in the following alternative treatment groups design results?

A) Both treatments appear to be equally effective. 
B) Neither treatment was effective. 
C) Both treatments might be effective or ineffective because we cannot rule out some alternative explanation like history or the passage of time as a plausible cause of the improvement in both groups. 
D) None of the above.

What Should We Conclude Regarding the Effectiveness of Treatments a and B