Which of the following is the best example of variability due to a treatment effect? 1. Two people with the same level of depression produce different scores on a depression inventory. 2. People...

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Which of the following is the best example of variability due to a treatment effect?
1. Two people with the same level of depression produce different scores on a depression
inventory.
2. People getting Treatment A have lower depression scores than those getting Treatment B
because Treatment A is more effective at helping depressed people.
3. Some people are more resistant to treatment for depression than others.
Ans:
Treatment Effect is the effect the treatment (independent) variable has on the dependent variable.
The treatment is given to the subjects in the sample group or groups. These subjects are expected
to be equated on certain variables which may have differential effect on the dependent variable.
Having equated the subjects in the experimental and control group, on some variables, it is
presumed that the effect of these variables on the...