Multiple Choice
In evaluating how effective an anti-bullying program in a school is,Iori asks students how many times they have been bullied in the past four months at the beginning and middle of the semester.However,since he did not use a control group,what form of invalidity may be a problem?
A) compensation.
B) maturation.
C) statistical regression.
D) experimental mortality.
E) causal time order.
Correct Answer:
Verified
Correct Answer:
Verified
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